id
stringlengths 9
16
| submitter
stringlengths 1
64
⌀ | authors
stringlengths 3
62.8k
| title
stringlengths 1
382
| comments
stringlengths 1
1.15k
⌀ | journal-ref
stringlengths 1
557
⌀ | doi
stringlengths 7
153
⌀ | report-no
stringlengths 1
509
⌀ | categories
stringlengths 5
125
| license
stringclasses 9
values | abstract
stringlengths 6
6.09k
| versions
listlengths 1
187
| update_date
timestamp[s]date 2007-05-23 00:00:00
2025-04-04 00:00:00
| authors_parsed
listlengths 1
2.83k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
quant-ph/0605042
|
Robert Collins
|
Sara Pellegrini, Ryan E. Warburton, Lionel J. J. Tan, Jo Shien Ng,
Andrey B. Krysa, Kristian Groom, John P. R. David, Sergio Cova, Michael J.
Robertson, and Gerald S. Buller
|
Design and Performance of an InGaAs-InP Single-Photon Avalanche Diode
Detector
| null |
IEEE Journal of Quantum Electronics, Volume 42 (4), pp397-403
(2006)
|
10.1109/JQE.2006.871067
| null |
quant-ph
| null |
This paper describes the design, fabrication, and performance of
planar-geometry InGaAs-InP devices which were specifically developed for
single-photon detection at a wavelength of 1550 nm. General performance issues
such as dark count rate, single-photon detection efficiency, afterpulsing, and
jitter are described.
|
[
{
"version": "v1",
"created": "Wed, 3 May 2006 17:48:37 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Pellegrini",
"Sara",
""
],
[
"Warburton",
"Ryan E.",
""
],
[
"Tan",
"Lionel J. J.",
""
],
[
"Ng",
"Jo Shien",
""
],
[
"Krysa",
"Andrey B.",
""
],
[
"Groom",
"Kristian",
""
],
[
"David",
"John P. R.",
""
],
[
"Cova",
"Sergio",
""
],
[
"Robertson",
"Michael J.",
""
],
[
"Buller",
"Gerald S.",
""
]
] |
quant-ph/0605043
|
Dominic William Berry
|
Dominic W. Berry, A. I. Lvovsky, Barry C. Sanders
|
Efficiency limits for linear optical processing of single photons and
single-rail qubits
|
10 pages, 4 figures
|
Journal of the Optical Society of America B 24, 189 (2007)
|
10.1364/JOSAB.24.000189
| null |
quant-ph
| null |
We analyze the problem of increasing the efficiency of single-photon sources
or single-rail photonic qubits via linear optical processing and destructive
conditional measurements. In contrast to previous work we allow for the use of
coherent states and do not limit to photon-counting measurements. We conjecture
that it is not possible to increase the efficiency, prove this conjecture for
several important special cases, and provide extensive numerical results for
the general case.
|
[
{
"version": "v1",
"created": "Wed, 3 May 2006 20:12:42 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Berry",
"Dominic W.",
""
],
[
"Lvovsky",
"A. I.",
""
],
[
"Sanders",
"Barry C.",
""
]
] |
quant-ph/0605044
|
Narayan Ganesan
|
Narayan Ganesan, Tzyh-Jong Tarn
|
Information Extraction from Decohering Systems via Indirect Continuous
Measurement
|
4 pages, 1 Figure Minor revisions for continuity and relevance to
previous and current work
| null | null | null |
quant-ph
| null |
In this article we discuss a general information extraction scheme to gain
knowledge of the state and the amount of decoherence based on indirect
continuous measurement. The purpose of this information extraction is to
determine the feedback in order to control decoherence based on an ``output
equation", described by a bilinear form. An interacting bilinear form of
control system is used instead of master equation to analyze the dynamic
properties of the system. The analysis of continuous measurement on a
decohering quantum system has not been extensively studied before.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 05:47:55 GMT"
},
{
"version": "v2",
"created": "Wed, 6 Dec 2006 05:36:51 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Ganesan",
"Narayan",
""
],
[
"Tarn",
"Tzyh-Jong",
""
]
] |
quant-ph/0605045
|
Ramazan Sever
|
Sameer M. Ikhdair and Ramazan Sever
|
Bound-States of the Spinless Salpeter Equation for the PT-Symmetric
Generalized Hulthen Potential by the Nikiforov-Uvarov Method
|
24 pages
|
Int. J. Mod. Phys. E 17, 1107(2008)
|
10.1142/S0218301308010337
| null |
quant-ph
| null |
The one-dimensional spinless Salpeter equation has been solved for the
PT-symmetric generalized Hulth\'{e}n potential. The Nikiforov-Uvarov {NU)
method which is based on solving the second-order linear differential equations
by reduction to a generalized equation of hypergeometric type is used to obtain
exact energy eigenvalues and corresponding eigenfunctions. We have investigated
the positive and negative exact bound states of the s-states for different
types of complex generalized Hulthen potentials.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 10:59:41 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Ikhdair",
"Sameer M.",
""
],
[
"Sever",
"Ramazan",
""
]
] |
quant-ph/0605046
|
Robert Collins
|
Veronica Fernandez, Robert J. Collins, Karen J. Gordon, Paul D.
Townsend, and Gerald S. Buller
|
Gigahertz Clocked Quantum Key Distribution in Passive Optical Networks
|
IEEE LEOS Summer Topical 2006 - Quantum Communications in Telecom
Networks - July 17-19 2006 - Quebec City, Canada
| null |
10.1117/12.732476
| null |
quant-ph
| null |
Two multi-user approaches to fiber-based quantum key distribution systems
operating at gigahertz clock frequencies are presented, both compatible with
standard telecommunications fiber.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 10:52:52 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Fernandez",
"Veronica",
""
],
[
"Collins",
"Robert J.",
""
],
[
"Gordon",
"Karen J.",
""
],
[
"Townsend",
"Paul D.",
""
],
[
"Buller",
"Gerald S.",
""
]
] |
quant-ph/0605047
|
Curceanu Catalina
|
The VIP Collaboration
|
New experimental limit on the Pauli Exclusion Principle violation by
electrons
|
submitted to Phys. Lett. B
|
Phys. Lett. B641 (2006) 18
|
10.1016/j.physletb.2006.07.054
| null |
quant-ph
| null |
The Pauli Exclusion Principle (PEP) is one of the basic principles of modern
physics and, even if there are no compelling reasons to doubt its validity, it
is still debated today because an intuitive, elementary explanation is still
missing, and because of its unique stand among the basic symmetries of physics.
The present paper reports a new limit on the probability that PEP is violated
by electrons, in a search for a shifted K$_\alpha$ line in copper: the presence
of this line in the soft X-ray copper fluorescence would signal a transition to
a ground state already occupied by 2 electrons. The obtained value, ${1/2}
\beta^{2} \leq 4.5\times 10^{-28}$, improves the existing limit by almost two
orders of magnitude.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 15:03:54 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"The VIP Collaboration",
"",
""
]
] |
quant-ph/0605048
|
Alex Retzker
|
A. Retzker, E. Solano, B. Reznik
|
Tavis-Cummings model and collective multi-qubit entanglement in trapped
ions
|
6 pages, 3 figures. Accepted for publication in Physical Review A
|
Phys. Rev. A 75, 022312 (2007)
|
10.1103/PhysRevA.75.022312
| null |
quant-ph
| null |
We present a method of generating collective multi-qubit entanglement via
global addressing of an ion chain following the guidelines of the
Tavis-Cummings model, where several qubits are coupled to a collective motional
mode. We show that a wide family of Dicke states and irradiant states can be
generated by single global laser pulses, unitarily or helped with suitable
postselection techniques.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 16:01:15 GMT"
},
{
"version": "v2",
"created": "Fri, 26 Jan 2007 15:27:12 GMT"
}
] | 2013-05-29T00:00:00 |
[
[
"Retzker",
"A.",
""
],
[
"Solano",
"E.",
""
],
[
"Reznik",
"B.",
""
]
] |
quant-ph/0605049
|
Denes Petz
|
D. Petz, K.M. Hangos, A. Szanto and F. Szollosi
|
State tomography for two qubits using reduced densities
|
8 pages LATEX
|
J. Phys. A: Math. Gen. 39, 10901-10907, 2006.
|
10.1088/0305-4470/39/34/020
| null |
quant-ph
| null |
The optimal state determination (or tomography) is studied for a composite
system of two qubits when measurements can be performed on one of the qubits
and interactions of the two qubits can be implemented. The goal is to minimize
the number of interactions to be used. The algebraic method applied in the
paper leads to an extension of the concept of mutually unbiased measurements.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 19:37:15 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Petz",
"D.",
""
],
[
"Hangos",
"K. M.",
""
],
[
"Szanto",
"A.",
""
],
[
"Szollosi",
"F.",
""
]
] |
quant-ph/0605050
|
Steve Flammia
|
Steven T. Flammia
|
On SIC-POVMs in Prime Dimensions
|
6 pages, no figures. v3 Refs added, improved discussion of previous
work. Ref to a proof of the main conjecture also added
|
J. Phys. A: Math. Gen. 39 (2006) 13483-13493
|
10.1088/0305-4470/39/43/007
| null |
quant-ph
| null |
The generalized Pauli group and its normalizer, the Clifford group, have a
rich mathematical structure which is relevant to the problem of constructing
symmetric informationally complete POVMs (SIC-POVMs). To date, almost every
known SIC-POVM fiducial vector is an eigenstate of a "canonical" unitary in the
Clifford group. I show that every canonical unitary in prime dimensions p > 3
lies in the same conjugacy class of the Clifford group and give a class
representative for all such dimensions. It follows that if even one such
SIC-POVM fiducial vector is an eigenvector of such a unitary, then all of them
are (for a given such dimension). I also conjecture that in all dimensions d,
the number of conjugacy classes is bounded above by 3 and depends only on d mod
9, and I support this claim with computer computations in all dimensions < 48.
|
[
{
"version": "v1",
"created": "Thu, 4 May 2006 20:01:40 GMT"
},
{
"version": "v2",
"created": "Sun, 7 May 2006 19:18:29 GMT"
},
{
"version": "v3",
"created": "Fri, 20 Oct 2006 16:23:37 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Flammia",
"Steven T.",
""
]
] |
quant-ph/0605051
|
Davide Rossini
|
Davide Rossini, Tommaso Calarco, Vittorio Giovannetti, Simone
Montangero, Rosario Fazio
|
Decoherence by engineered quantum baths
|
4 pages, 4 figures
|
J. Phys. A: Math. Theor. 40 (2007) 8033-8040
|
10.1088/1751-8113/40/28/S12
| null |
quant-ph cond-mat.other
| null |
We introduce, and determine decoherence for, a wide class of non-trivial
quantum spin baths which embrace Ising, XY and Heisenberg universality classes
coupled to a two-level system. For the XY and Ising universality classes we
provide an exact expression for the decay of the loss of coherence beyond the
case of a central spin coupled uniformly to all the spins of the baths which
has been discussed so far in the literature. In the case of the Heisenberg spin
bath we study the decoherence by means of the time-dependent density matrix
renormalization group. We show how these baths can be engineered, by using
atoms in optical lattices.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 08:18:08 GMT"
}
] | 2007-06-27T00:00:00 |
[
[
"Rossini",
"Davide",
""
],
[
"Calarco",
"Tommaso",
""
],
[
"Giovannetti",
"Vittorio",
""
],
[
"Montangero",
"Simone",
""
],
[
"Fazio",
"Rosario",
""
]
] |
quant-ph/0605052
|
Robert Collins
|
Veronica Fernandez, Karen J. Gordon, Robert J. Collins, Paul D.
Townsend, Sergio D. Cova, Ivan Rech, Gerald S. Buller
|
Quantum Key Distribution in a Multi-User Network at Gigahertz Clock
rates
|
Presented at SPIE Symposium on Microtechnologies for the New
Millennium, Sevilla, Spain (May 2005)
|
Proceedings of SPIE, Volume 5840, "Photonic Materials, Devices,
and Applications", (2005)
| null | null |
quant-ph
| null |
In recent years quantum information research has lead to the discovery of a
number of remarkable new paradigms for information processing and
communication. These developments include quantum cryptography schemes that
offer unconditionally secure information transport guaranteed by
quantum-mechanical laws. Such potentially disruptive security technologies
could be of high strategic and economic value in the future. Two major issues
confronting researchers in this field are the transmission range (typically
<100km) and the key exchange rate, which can be as low as a few bits per second
at long optical fiber distances. This paper describes further research of an
approach to significantly enhance the key exchange rate in an optical fiber
system at distances in the range of 1-20km. We will present results on a number
of application scenarios, including point-to-point links and multi-user
networks. Quantum key distribution systems have been developed, which use
standard telecommunications optical fiber, and which are capable of operating
at clock rates of up to 2GHz. They implement a polarization-encoded version of
the B92 protocol and employ vertical-cavity surface-emitting lasers with
emission wavelengths of 850 nm as weak coherent light sources, as well as
silicon single-photon avalanche diodes as the single photon detectors. The
point-to-point quantum key distribution system exhibited a quantum bit error
rate of 1.4%, and an estimated net bit rate greater than 100,000 bits- per
second for a 4.2 km transmission range.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 09:40:18 GMT"
}
] | 2009-09-29T00:00:00 |
[
[
"Fernandez",
"Veronica",
""
],
[
"Gordon",
"Karen J.",
""
],
[
"Collins",
"Robert J.",
""
],
[
"Townsend",
"Paul D.",
""
],
[
"Cova",
"Sergio D.",
""
],
[
"Rech",
"Ivan",
""
],
[
"Buller",
"Gerald S.",
""
]
] |
quant-ph/0605053
|
Robert Collins
|
Karen J. Gordon, Veronica Fernandez, Robert J. Collins, Ivan Rech,
Sergio D. Cova, Paul D. Townsend, and Gerald S. Buller
|
3.3 Gigahertz Clocked Quantum Key Distribution System
|
Presented at ECOC 05, Glasgow, UK, (September 2005)
| null | null | null |
quant-ph
| null |
A fibre-based quantum key distribution system operating up to a clock
frequency of 3.3GHz is presented. The system demonstrates significantly
increased key exchange rate potential and operates at a wavelength of 850nm.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 09:58:05 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Gordon",
"Karen J.",
""
],
[
"Fernandez",
"Veronica",
""
],
[
"Collins",
"Robert J.",
""
],
[
"Rech",
"Ivan",
""
],
[
"Cova",
"Sergio D.",
""
],
[
"Townsend",
"Paul D.",
""
],
[
"Buller",
"Gerald S.",
""
]
] |
quant-ph/0605054
|
Apostolos Vourdas
|
A. Vourdas
|
The Frobenius formalism in Galois quantum systems
| null |
Acta Applicandae Mathematicae 93 (2006) 197-214
|
10.1007/s10440-006-9040-7
| null |
quant-ph
| null |
Quantum systems in which the position and momentum take values in the ring
${\cal Z}_d$ and which are described with $d$-dimensional Hilbert space, are
considered. When $d$ is the power of a prime, the position and momentum take
values in the Galois field $GF(p^ \ell)$, the position-momentum phase space is
a finite geometry and the corresponding `Galois quantum systems' have stronger
properties. The study of these systems uses ideas from the subject of field
extension in the context of quantum mechanics. The Frobenius automorphism in
Galois fields leads to Frobenius subspaces and Frobenius transformations in
Galois quantum systems. Links between the Frobenius formalism and Riemann
surfaces, are discussed.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 13:33:18 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Vourdas",
"A.",
""
]
] |
quant-ph/0605055
|
Jacques Vigue
|
Alain Miffre (LCAR), Marion Jacquey (LCAR), Matthias B\"uchner (LCAR),
G\'erard Tr\'enec (LCAR), Jacques Vigu\'e (LCAR)
|
Atom interferometry
|
submitted to Physica Scripta as a Comment on Atomic Molecular and
Optical Physics
| null |
10.1088/0031-8949/74/2/N01
| null |
quant-ph
| null |
In this paper, we present a brief overview of atom interferometry. This field
of research has developed very rapidly since 1991. Atom and light wave
interferometers present some similarities but there are very important
differences in the tools used to manipulate these two types of waves. Moreover,
the sensitivity of atomic waves and light waves to their environment is very
different. Atom interferometry has already been used for a large variety of
studies: measurements of atomic properties and of inertial effects
(accelerations and rotations), new access to some fundamental constants,
observation of quantum decoherence, etc. We review the techniques used for a
coherent manipulation of atomic waves and the main applications of atom
interferometers.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 14:06:40 GMT"
}
] | 2016-08-16T00:00:00 |
[
[
"Miffre",
"Alain",
"",
"LCAR"
],
[
"Jacquey",
"Marion",
"",
"LCAR"
],
[
"Büchner",
"Matthias",
"",
"LCAR"
],
[
"Trénec",
"Gérard",
"",
"LCAR"
],
[
"Vigué",
"Jacques",
"",
"LCAR"
]
] |
quant-ph/0605056
|
I. Rotter
|
E.N. Bulgakov, I. Rotter, and A.F. Sadreev
|
Phase rigidity and avoided level crossings in the complex energy plane
|
6 pages, 3 figures
| null |
10.1103/PhysRevE.74.056204
| null |
quant-ph
| null |
We consider the effective Hamiltonian of an open quantum system, its
biorthogonal eigenfunctions $\phi_\lambda$ and define the value $r_\lambda =
(\phi_\lambda|\phi_\lambda)/<\phi_\lambda|\phi_\lambda>$ that characterizes the
phase rigidity of the eigenfunctions $\phi_\lambda$. In the scenario with
avoided level crossings, $r_\lambda$ varies between 1 and 0 due to the mutual
influence of neighboring resonances. The variation of $r_\lambda$ may be
considered as an internal property of an {\it open} quantum system. In the
literature, the phase rigidity $\rho$ of the scattering wave function
$\Psi^E_C$ is considered. Since $\Psi^E_C$ can be represented in the interior
of the system by the $\phi_\lambda$, the phase rigidity $\rho$ of the
$\Psi^E_C$ is related to the $r_\lambda$ and therefore also to the mutual
influence of neighboring resonances. As a consequence, the reduction of the
phase rigidity $\rho$ to values smaller than 1 should be considered, at least
partly, as an internal property of an open quantum system in the overlapping
regime. The relation to measurable values such as the transmission through a
quantum dot, follows from the fact that the transmission is, in any case,
resonant with respect to the effective Hamiltonian. We illustrate the relation
between phase rigidity $\rho$ and transmission numerically for small open
cavities.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 15:04:07 GMT"
},
{
"version": "v2",
"created": "Wed, 9 Aug 2006 14:05:45 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Bulgakov",
"E. N.",
""
],
[
"Rotter",
"I.",
""
],
[
"Sadreev",
"A. F.",
""
]
] |
quant-ph/0605057
|
Zoltan Kurucz
|
Z. Kurucz, P. Adam, and J. Janszky
|
General criterion for oblivious remote state preparation
|
5 pages, RevTeX
|
Phys. Rev. A 73, 062301 (2006)
|
10.1103/PhysRevA.73.062301
| null |
quant-ph
| null |
A necessary and sufficient condition is given for general exact remote state
preparation (RSP) protocols to be oblivious, that is, no information about the
target state can be retrieved from the classical message. A novel criterion in
terms of commutation relations is also derived for the existence of
deterministic exact protocols in which Alice's measurement eigenstates are
related to each other by fixed linear operators similar to Bob's unitaries. For
non-maximally entangled resources, it provides an easy way to search for RSP
protocols. As an example, we show how to reduce the case of partially entangled
resources to that of maximally entangled ones, and we construct RSP protocols
exploiting the structure of the irreducible representations of Abelian groups.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 15:20:30 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Kurucz",
"Z.",
""
],
[
"Adam",
"P.",
""
],
[
"Janszky",
"J.",
""
]
] |
quant-ph/0605058
|
L. M. Duan
|
T. P. Bodiya, L.-M. Duan
|
Scalable Generation of Graph-State Entanglement through Realistic Linear
Optics
|
4 pages, 3 figures
| null |
10.1103/PhysRevLett.97.143601
| null |
quant-ph
| null |
We propose a scheme for efficient construction of graph states using
realistic linear optics, imperfect photon source and single-photon detectors.
For any many-body entanglement represented by tree graph states, we prove that
the overall preparation and detection efficiency scales only polynomially with
the size of the graph, no matter how small the efficiencies for the photon
source and the detectors.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 15:49:30 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Bodiya",
"T. P.",
""
],
[
"Duan",
"L. -M.",
""
]
] |
quant-ph/0605059
|
Jacob Dunningham
|
Jacob Dunningham and David Hallwood
|
Creation of macroscopic superpositions of flow states with Bose-Einstein
condensates
|
9 pages, 7 figures
| null |
10.1103/PhysRevA.74.023601
| null |
quant-ph
| null |
We present a straightforward scheme for creating macroscopic superpositions
of different superfluid flow states of Bose-Einstein condensates trapped in
optical lattices. This scheme has the great advantage that all the techniques
required are achievable with current experiments. Furthermore, the relative
difficulty of creating cats scales favorably with the size of the cat. This
means that this scheme may be well-suited to creating superpositions involving
large numbers of particles. Such states may have interesting technological
applications such as making quantum-limited measurements of angular momentum.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 16:12:28 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Dunningham",
"Jacob",
""
],
[
"Hallwood",
"David",
""
]
] |
quant-ph/0605060
|
Maurice de Gosson
|
Maurice de Gosson and Serge de Gosson
|
Squeezed Coherent States and a Semiclassical Propagator for the
Schroedinger equation in Phase
| null | null | null | null |
quant-ph
| null |
We construct semiclassical solutions of the symplectically covariant
Schroedinger phase-space equation rigorously studied in a previous paper; we
use for this purpose an adaptation of Littlejohn's nearby-orbit method. We take
the opportunity to discuss in some detail the so fruitful notion of squeezed
coherent state and the action of the metaplectic group on these states.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 21:54:10 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"de Gosson",
"Maurice",
""
],
[
"de Gosson",
"Serge",
""
]
] |
quant-ph/0605061
|
Daniel Tasca
|
D.S. Tasca, M.P. Almeida, S.P. Walborn, P. Pellat-Finet, C.H. Monken
and P.H. Souto Ribeiro
|
Violation of Bell's Inequality with Transverse Spatial Variables Using
Fractional Fourier Transforms
|
This paper has been withdrawn
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper has been withdrawn due to a crucial theoretical and experimental
error.
|
[
{
"version": "v1",
"created": "Fri, 5 May 2006 23:03:11 GMT"
},
{
"version": "v2",
"created": "Mon, 18 Dec 2006 18:20:20 GMT"
},
{
"version": "v3",
"created": "Thu, 17 Sep 2009 18:35:29 GMT"
}
] | 2009-09-17T00:00:00 |
[
[
"Tasca",
"D. S.",
""
],
[
"Almeida",
"M. P.",
""
],
[
"Walborn",
"S. P.",
""
],
[
"Pellat-Finet",
"P.",
""
],
[
"Monken",
"C. H.",
""
],
[
"Ribeiro",
"P. H. Souto",
""
]
] |
quant-ph/0605062
|
Lucian Constantin
|
John P. Perdew, Lucian A. Constantin, Espen Sagvolden, and Kieron
Burke
|
Relevance of the slowly-varying electron gas to atoms, molecules, and
solids
|
5 pages, 4 figures, submitted at PRL
| null |
10.1103/PhysRevLett.97.223002
| null |
quant-ph cond-mat.mtrl-sci
| null |
Under a certain scaling, the electron densities of finite systems become both
large and slowly-varying, so that the gradient expansions of the density
functionals for the Kohn-Sham kinetic and exchange energies become
asymptotically exact to order $\nabla^2$. Neutral atoms of large $Z$ scale
similarly, but a cusp correction at the nucleus requires generalizing the
gradient expansion for exchange, producing the wrong gradient coefficient in
the slowly-varying limit. Meta-generalized gradient approximations (meta-GGA's)
recover both the slowly-varying and large-$Z$ limits. GGA correlation energies
of large-Z atoms are found to be accurate.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 03:02:42 GMT"
},
{
"version": "v2",
"created": "Thu, 20 Jul 2006 10:18:05 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Perdew",
"John P.",
""
],
[
"Constantin",
"Lucian A.",
""
],
[
"Sagvolden",
"Espen",
""
],
[
"Burke",
"Kieron",
""
]
] |
quant-ph/0605063
|
Xiang Hao
|
Xiang Hao, Shiqun Zhu
|
Entanglement in a Quantum Mixed-Spin Chain
|
11 pages, 3 figures
| null |
10.1016/j.physleta.2007.01.053
| null |
quant-ph
| null |
The entanglement in a general mixed spin chain with arbitrary spin $S$ and
1/2 is investigated in the thermodynamical limit. The entanglement is witnessed
by the magnetic susceptibility which decides a characteristic temperature for
an entangled thermal state. The characteristic temperature is nearly
proportional to the interaction $J$ and the mixed spin $S$. The bound of
negativity is obtained on the basis of the magnetic susceptibility. It is found
that the macroscopic magnetic properties are affected by the quantum
entanglement in the real solids. Meanwhile, the entanglement can be
quantitatively evaluated by the thermodynamical observable.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 05:16:56 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Hao",
"Xiang",
""
],
[
"Zhu",
"Shiqun",
""
]
] |
quant-ph/0605064
|
Shou Zhang
|
Hong-Fu Wang, Xin Ji, Shou Zhang
|
Improving the security of multiparty quantum secret splitting and
quantum state sharing
|
To appear in Phys. Lett. A
| null |
10.1016/j.physleta.2006.04.110
| null |
quant-ph
| null |
A protocol for multiparty quantum secret splitting (MQSS) with an ordered $N$
Einstein-Podolsky-Rosen (EPR) pairs and Bell state measurements is recently
proposed by Deng {\rm et al.} [Phys. Lett. A 354(2006)190]. We analyzed the
security of the protocol and found that this protocol is secure for any other
eavesdropper except for the agent Bob who adopts intercept-and-resend attack.
Bob can obtain all the information of Alice's alone without being found. We
also propose an improved version of the MQSS protocol.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 06:42:44 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Wang",
"Hong-Fu",
""
],
[
"Ji",
"Xin",
""
],
[
"Zhang",
"Shou",
""
]
] |
quant-ph/0605065
|
Shou Zhang
|
Jie Song, Shou Zhang
|
Secure Quantum Secret Sharing Based on Reusable GHZ States as Secure
Carriers
| null |
Chinese Physics Letters, 23,6(2006)1383
|
10.1088/0256-307X/23/6/008
| null |
quant-ph
| null |
We show a potential eavesdropper can eavesdrop whole secret information when
the legitimate users use secure carrier to encode and decode classical
information repeatedly in the protocol [proposed in Bagherinezhad S and
Karimipour V 2003 Phys. Rev. A \textbf{67} 044302]. Then we present a revised
quantum secret sharing protocol by using Greenberger-Horne-Zeilinger state as
secure carrier. Our protocol can resist Eve's attack.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 06:51:52 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Song",
"Jie",
""
],
[
"Zhang",
"Shou",
""
]
] |
quant-ph/0605066
|
F\'elix Bussi\`eres
|
Felix Bussieres, Yasaman Soudagar, Guido Berlin, Suzanne Lacroix,
Nicolas Godbout
|
Manipulating time-bin qubits with fiber optics components
|
2 pages, 3 figures, to be published in the proceedings of the IEEE
LEOS 2006 topical meeting, Quebec city, Canada, July 2006
| null |
10.1109/LEOSST.2006.1693998
| null |
quant-ph
| null |
We propose two experimental schemes to implement arbitrary unitary single
qubit operations on single photons encoded in time-bin qubits. Both schemes
require fiber optics components that are available with current technology.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 17:33:00 GMT"
}
] | 2016-11-18T00:00:00 |
[
[
"Bussieres",
"Felix",
""
],
[
"Soudagar",
"Yasaman",
""
],
[
"Berlin",
"Guido",
""
],
[
"Lacroix",
"Suzanne",
""
],
[
"Godbout",
"Nicolas",
""
]
] |
quant-ph/0605067
|
Durdu \"O. G\"uney
|
Durdu \"O. G\"uney and David A. Meyer
|
Integrated Conditional Teleportation and Readout Circuit Based on a
Photonic Crystal Single Chip
|
16 pages, 5 figures, submitted to the J. Opt. Soc. Am. B feature
issue on Optical Quantum-Information Science
|
J. Opt. Soc. Am. B 24, 391-397 (2007)
|
10.1364/JOSAB.24.000391
| null |
quant-ph
| null |
We demonstrate the design of an integrated conditional quantum teleportation
circuit and a readout circuit using a two-dimensional photonic crystal single
chip. Fabrication and testing of the proposed quantum circuit can be
accomplished with current or near future semiconductor process technology and
experimental techniques. The readout part of our device, which has potential
for independent use as an atomic interferometer, can also be used on its own or
integrated with other compatible optical circuits to achieve atomic state
detection. Further improvement of the device in terms of compactness and
robustness could be achieved by integrating it with sources and detectors in
the optical regime.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 20:05:09 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Güney",
"Durdu Ö.",
""
],
[
"Meyer",
"David A.",
""
]
] |
quant-ph/0605068
|
Jiannis Pachos
|
Jiannis K. Pachos (DAMTP)
|
The Wavefunction of an Anyon
|
8 pages, 5 figures
|
AnnalsPhys.322:1254-1264,2007
|
10.1016/j.aop.2006.05.007
| null |
quant-ph cond-mat.mes-hall hep-th
| null |
We consider a two-dimensional spin system in a honeycomb lattice
configuration that exhibits anyonic and fermionic excitations [Kitaev,
cond-mat/0506438]. The exact spectrum that corresponds to the translationally
invariant case of a vortex-lattice is derived from which the energy of a single
pair of vortices can be estimated. The anyonic properties of the vortices are
demonstrated and their generation and transportation manipulations are
explicitly given. A simple interference experiment with six spins is proposed
that can reveal the anyonic statistics of this model.
|
[
{
"version": "v1",
"created": "Sat, 6 May 2006 20:35:46 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Pachos",
"Jiannis K.",
"",
"DAMTP"
]
] |
quant-ph/0605069
|
Erasmo Recami
|
V. S. Olkhovsky and E. Recami
|
Time as a quantum observable
|
19 pages, including two Figures. [The source-file is in Word]
|
Int.J.Mod.Phys.A22:5063-5087,2007
|
10.1142/S0217751X0703724X
| null |
quant-ph
| null |
Some results are reviewed and developments are presented on the study of Time
in quantum mechanics as an observable, canonically conjugate to energy.
Operators for the observable Time are investigated in particle and photon
quantum theory. In particular, this paper deals with the hermitian (more
precisely, maximal hermitian, but non-selfadjoint) operator for Time which
appears: (i) for particles, in ordinary non-relativistic quantum mechanics; and
(ii) for photons, in first-quantization quantum electrodynamics.
|
[
{
"version": "v1",
"created": "Sun, 7 May 2006 01:49:32 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Olkhovsky",
"V. S.",
""
],
[
"Recami",
"E.",
""
]
] |
quant-ph/0605070
|
Yu Shi
|
Yu Shi
|
High Energy Quantum Teleportation Using Neutral Koans
|
6 pages, 4 figures. Final version, with minor corrections
|
Phys.Lett.B641:75-80,2006; Erratum-ibid.B641:492,2006
|
10.1016/j.physletb.2006.08.015 10.1016/j.physletb.2006.09.007
| null |
quant-ph hep-ph hep-th
| null |
We describe a scheme of stochastic implementations of quantum teleportation
and entanglement swapping in terms of neutral kaons. In this scheme, the kaon
whose state is to be teleported collides with one of the two entangled kaons in
an Einstein-Podolsky-Rosen state. Subsequent detection of the outgoing
particles of the collision completes the two-qubit projection on Alice side.
There appear novel features, which connects quantum information science with
fundamental laws of particle physics.
|
[
{
"version": "v1",
"created": "Sun, 7 May 2006 12:02:44 GMT"
},
{
"version": "v2",
"created": "Mon, 21 Aug 2006 01:55:59 GMT"
},
{
"version": "v3",
"created": "Mon, 11 Sep 2006 02:36:51 GMT"
}
] | 2010-11-11T00:00:00 |
[
[
"Shi",
"Yu",
""
]
] |
quant-ph/0605071
|
Navin Khaneja
|
Navin Khaneja, Bjoern Heitmann, Andreas Spoerl, Haidong Yuan, Thomas
Schulte-Herbrueggen and Steffen J. Glaser
|
Quantum Gate Design Metric
| null | null | null | null |
quant-ph
| null |
What is the time-optimal way of realizing quantum operations? Here, we show
how important instances of this problem can be related to the study of shortest
paths on the surface of a sphere under a special metric. Specifically, we
provide an efficient synthesis of a controlled NOT (CNOT) gate between qubits
coupled indirectly via Ising-type couplings to a third spin. Our implementation
of the CNOT gate is more than twice as fast as conventional approaches. The
pulse sequences for efficient manipulation of our coupled spin system are
obtained by explicit computation of geodesics on a sphere under the special
metric. These methods are also used for the efficient synthesis of indirect
couplings and of the Toffoli gate. We provide experimental realizations of the
presented methods on a linear three-spin chain with Ising couplings.
|
[
{
"version": "v1",
"created": "Sun, 7 May 2006 15:17:03 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Khaneja",
"Navin",
""
],
[
"Heitmann",
"Bjoern",
""
],
[
"Spoerl",
"Andreas",
""
],
[
"Yuan",
"Haidong",
""
],
[
"Schulte-Herbrueggen",
"Thomas",
""
],
[
"Glaser",
"Steffen J.",
""
]
] |
quant-ph/0605072
|
Stephen Adler
|
Stephen L. Adler
|
Lower and Upper Bounds on CSL Parameters from Latent Image Formation and
IGM Heating
|
Tex, 50p To appear in J. Phys. A: Math-Gen, in the special issue
``The Quantum Universe'' in honor of G. C. Ghirardi. Version 9(apart from
minor copy-editing style changes) is the final published version. SEE ADDED
NOTE IN ABSTRACT
|
J.Phys.A40:2935-2958,2007; Erratum-ibid.A40:13501,2007
|
10.1088/1751-8113/40/12/S03 10.1088/1751-8121/40/44/C01
| null |
quant-ph hep-ph hep-th
| null |
We study lower and upper bounds on the parameters for stochastic state vector
reduction, focusing on the mass-proportional continuous spontaneous
localization (CSL) model. We show that the assumption that the state vector is
reduced whan a latent image is formed, in photography or etched track
detection, requires a CSL rate parameter $\lambda$ that is larger than
conventionally assumed by a factor of roughly $2 \times 10^{9\pm 2}$, for a
correlation length $r_C$ of $10^{-5}{\rm cm}$. We reanalyze existing upper
bounds on the reduction rate and conclude that all are compatible with such an
increase in $\lambda$. The best bounds that we have obtained come from a
consideration of heating of the intergalactic medium (IGM), which shows that
$\lambda$ can be at most $\sim 10^{8\pm 1}$ times as large as the standard CSL
value, again for $r_C=10^{-5} {\rm cm}$. (For both the lower and upper bounds,
quoted errors are not purely statistical errors, but rather are estimates
reflecting modeling uncertainties.) We discuss modifications in our analysis
corresponding to a larger value of $r_C$. With a substantially enlarged rate
parameter, CSL effects may be within range of experimental detection (or
refutation) with current technologies. ADDED NOTE: A careful calculation of
radiation from atomic systems in the CSL model (Adler and Ramazanoglu,
arXiv:0707.3134) has reinstated the bound obtained by Fu as the best upper
bound on lambda, with significant implications for CSL model phenomenology.
|
[
{
"version": "v1",
"created": "Sun, 7 May 2006 15:51:27 GMT"
},
{
"version": "v2",
"created": "Wed, 10 May 2006 20:35:16 GMT"
},
{
"version": "v3",
"created": "Sun, 28 May 2006 15:27:59 GMT"
},
{
"version": "v4",
"created": "Wed, 21 Jun 2006 18:24:21 GMT"
},
{
"version": "v5",
"created": "Mon, 26 Jun 2006 20:17:41 GMT"
},
{
"version": "v6",
"created": "Mon, 31 Jul 2006 14:53:14 GMT"
},
{
"version": "v7",
"created": "Thu, 3 Aug 2006 19:01:02 GMT"
},
{
"version": "v8",
"created": "Wed, 23 Aug 2006 20:35:47 GMT"
},
{
"version": "v9",
"created": "Mon, 24 Sep 2007 15:56:07 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Adler",
"Stephen L.",
""
]
] |
quant-ph/0605073
|
Younghun Kwon
|
Sangjin Sim, Jeongwan Jin, and Younghun Kwon
|
Best Fidelity Conditions for Three Party Quantum Teleportation
| null |
International Journal of Theoretical Physics, Vol. 44, No. 9,
September 2005
| null | null |
quant-ph
| null |
Using the entangled three qubit states classified by Acin et al. we find the
best fidelity conditions for quantum teleportation among three parties.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 02:53:29 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Sim",
"Sangjin",
""
],
[
"Jin",
"Jeongwan",
""
],
[
"Kwon",
"Younghun",
""
]
] |
quant-ph/0605074
|
Satyabrata Adhikari
|
Satyabrata Adhikari, B. S. Choudhury
|
Improving the Fidelity of deletion
|
9 pages, Accepted for publication in Physical Review A
| null |
10.1103/PhysRevA.73.054303
| null |
quant-ph
| null |
In this work we study the quantum deletion machine with two transformers and
show that the deletion machine with single transformer performs better than the
deletion machine with more than two transformers. We also observe that the
fidelity of deletion depends on the blank state used in the deleter and so for
different blank state the fidelity is different. Further, we study the
Pati-Braunsein deleter with transformer.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 08:24:43 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Adhikari",
"Satyabrata",
""
],
[
"Choudhury",
"B. S.",
""
]
] |
quant-ph/0605075
|
Jordi Mompart
|
R. Garcia-Maraver, K. Eckert, R. Corbalan, and J. Mompart
|
Cavity-QED entangled photon source based on two truncated Rabi
oscillations
|
18 pages, 9 figures; submitted for the "Optical Quantum Information
Science Special Issue" of JOSA B
| null |
10.1364/JOSAB.24.000257
| null |
quant-ph
| null |
We discuss a cavity-QED scheme to deterministically generate entangled
photons pairs by using a three-level atom successively coupled to two single
longitudinal mode high-Q cavities presenting polarization degeneracy. The first
cavity is prepared in a well defined Fock state with two photons with opposite
circular polarizations while the second cavity remains in the vacuum state. A
half-of-a-resonant Rabi oscillation in each cavity transfers one photon from
the first to the second cavity, leaving the photons entangled in their
polarization degree of freedom. The feasibility of this implementation and some
practical considerations are discussed for both, microwave and optical regimes.
In particular, Monte Carlo wave function simulations have been performed with
state-of-the-art parameter values to evaluate the success probability of the
cavity-QED source in producing entangled photon pairs as well as its
entanglement capability.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 11:51:59 GMT"
},
{
"version": "v2",
"created": "Tue, 30 May 2006 15:46:24 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Garcia-Maraver",
"R.",
""
],
[
"Eckert",
"K.",
""
],
[
"Corbalan",
"R.",
""
],
[
"Mompart",
"J.",
""
]
] |
quant-ph/0605076
|
Robert Collins
|
K. J. Gordon, V. Fernandez, G. S. Buller, I. Rech, S. D. Cova, and P.
D. Townsend
|
Quantum key distribution system clocked at 2 GHz
| null |
Optics Express, Volume13 (8), pp3015-3020 (2005)
|
10.1364/OPEX.13.003015
| null |
quant-ph
| null |
An improved quantum key distribution test system operating at clock rates of
up to 2GHz using a specially adapted commercially available silicon single
photon avalanche diode is presented. The use of improved detectors has improved
the fibre-based test system performance in terms of transmission distance and
quantum bit error rate.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 12:11:45 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Gordon",
"K. J.",
""
],
[
"Fernandez",
"V.",
""
],
[
"Buller",
"G. S.",
""
],
[
"Rech",
"I.",
""
],
[
"Cova",
"S. D.",
""
],
[
"Townsend",
"P. D.",
""
]
] |
quant-ph/0605077
|
Shigeru Yamashita
|
Tomoya Suzuki, Shigeru Yamashita, Masaki Nakanishi and Katsumasa
Watanabe
|
Robust Quantum Algorithms with $\eps$-Biased Oracles
|
To appear in COCOON'06
| null | null | null |
quant-ph
| null |
This paper considers the quantum query complexity of {\it $\eps$-biased
oracles} that return the correct value with probability only $1/2 + \eps$. In
particular, we show a quantum algorithm to compute $N$-bit OR functions with
$O(\sqrt{N}/{\eps})$ queries to $\eps$-biased oracles. This improves the known
upper bound of $O(\sqrt{N}/{\eps}^2)$ and matches the known lower bound; we
answer the conjecture raised by the paper by Iwama et al. affirmatively. We
also show a quantum algorithm to cope with the situation in which we have no
knowledge about the value of $\eps$. This contrasts with the corresponding
classical situation, where it is almost hopeless to achieve more than a
constant success probability without knowing the value of $\eps$.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 13:10:35 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Suzuki",
"Tomoya",
""
],
[
"Yamashita",
"Shigeru",
""
],
[
"Nakanishi",
"Masaki",
""
],
[
"Watanabe",
"Katsumasa",
""
]
] |
quant-ph/0605078
|
Guo-Qiang Zhu
|
Guo-Qiang Zhu
|
Geometrical phase of thermal state in hydrogen atom
|
5 pages, 7 figures
| null | null | null |
quant-ph
| null |
In this paper, the geometric phase of thermal state in hydrogen atom under
the effects of external magnetic field is considered. Especially the effects of
the temperature upon the geometric phase is discussed. Also we discuss the time
evolution of entanglement of the system. They show some similar behaviors.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 15:11:17 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Zhu",
"Guo-Qiang",
""
]
] |
quant-ph/0605079
|
Jon Magne Leinaas
|
Jon Magne Leinaas, Jan Myrheim and Eirik Ovrum
|
Geometrical aspects of entanglement
|
31 pages, 6 figures
| null |
10.1103/PhysRevA.74.012313
| null |
quant-ph
| null |
We study geometrical aspects of entanglement, with the Hilbert--Schmidt norm
defining the metric on the set of density matrices. We focus first on the
simplest case of two two-level systems and show that a ``relativistic''
formulation leads to a complete analysis of the question of separability. Our
approach is based on Schmidt decomposition of density matrices for a composite
system and non-unitary transformations to a standard form. The positivity of
the density matrices is crucial for the method to work. A similar approach
works to some extent in higher dimensions, but is a less powerful tool. We
further present a numerical method for examining separability, and illustrate
the method by a numerical study of bound entanglement in a composite system of
two three-level systems.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 17:25:55 GMT"
}
] | 2013-05-29T00:00:00 |
[
[
"Leinaas",
"Jon Magne",
""
],
[
"Myrheim",
"Jan",
""
],
[
"Ovrum",
"Eirik",
""
]
] |
quant-ph/0605080
|
Brian Dodson
|
Brian Dodson
|
When the Left Hand and the Right Hand Cooperate Without Informing their
Owner
|
8 pages
| null | null | null |
quant-ph
| null |
A specific instantiation of classical correlation from entangled quantum
resources can be established at a distance through the use of local
measurements without classical communication. It is thereby possible to, e.g.,
allow distant entities to randomly combine forces on a course of action which
is an element of a predetermined set of possible actions. When this protocol is
used, no one knows which action has been chosen. The protocol is intrinsically
secure in the same sense as a one-time pad. The entities must have a shared
entanglement resource, be able to measure that resource in a predetermined
reference frame, and know what they must do to carry out all of the possible
actions.
|
[
{
"version": "v1",
"created": "Mon, 8 May 2006 21:33:34 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Dodson",
"Brian",
""
]
] |
quant-ph/0605081
|
Kazuo Fujikawa
|
Kazuo Fujikawa
|
Geometric phases, gauge symmetries and ray representation
|
30 pages. Some clarifying sentences have been added in abstract and
in the body of the paper. A new additional reference and some typos have been
corrected. To appear in Int. J. Mod. Phys. A
|
Int.J.Mod.Phys. A21 (2006) 5333-5358
|
10.1142/S0217751X06033799
| null |
quant-ph hep-th
| null |
The conventional formulation of the non-adiabatic (Aharonov-Anandan) phase is
based on the equivalence class $\{e^{i\alpha(t)}\psi(t,\vec{x})\}$ which is not
a symmetry of the Schr\"{o}dinger equation. This equivalence class when
understood as defining generalized rays in the Hilbert space is not generally
consistent with the superposition principle in interference and polarization
phenomena. The hidden local gauge symmetry, which arises from the arbitrariness
of the choice of coordinates in the functional space, is then proposed as a
basic gauge symmetry in the non-adiabatic phase. This re-formulation reproduces
all the successful aspects of the non-adiabatic phase in a manner manifestly
consistent with the conventional notion of rays and the superposition
principle. The hidden local symmetry is thus identified as the natural origin
of the gauge symmetry in both of the adiabatic and non-adiabatic phases in the
absence of gauge fields, and it allows a unified treatment of all the geometric
phases. The non-adiabatic phase may well be regarded as a special case of the
adiabatic phase in this re-formulation, contrary to the customary understanding
of the adiabatic phase as a special case of the non-adiabatic phase. Some
explicit examples of geometric phases are discussed to illustrate this
re-formulation.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 07:11:40 GMT"
},
{
"version": "v2",
"created": "Tue, 16 May 2006 08:06:07 GMT"
},
{
"version": "v3",
"created": "Wed, 12 Jul 2006 06:00:29 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Fujikawa",
"Kazuo",
""
]
] |
quant-ph/0605082
|
K. Ch. Chatzisavvas
|
C.P. Panos, K.Ch. Chatzisavvas, Ch.C. Moustakidis, E.G. Kyrkou
|
Comparison of SDL and LMC measures of complexity: Atoms as a testbed
|
14 pages, 2 figures, revised version, accepted for publiaction in
Physics Letters A
| null |
10.1016/j.physleta.2006.10.075
| null |
quant-ph nlin.AO physics.atom-ph
| null |
The "simple" measure of complexity of Shiner, Davison and Landsberg (SDL) and
the "statistical" one, according to Lopez-Ruiz, Mancini and Calbet (LMC), are
compared in atoms as functions of the atomic number Z. Shell effects i.e. local
minima at the closed shells atoms are observed, as well as certain qualitative
trends of SDL and LMC measueres of complexity. If we impose the condition that
SDL and LMC behave similarly as functions of Z, then we can conclude that
complexity increases with Z and for atoms the strength of disorder is zero and
order is four.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 10:17:47 GMT"
},
{
"version": "v2",
"created": "Mon, 16 Oct 2006 10:22:24 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Panos",
"C. P.",
""
],
[
"Chatzisavvas",
"K. Ch.",
""
],
[
"Moustakidis",
"Ch. C.",
""
],
[
"Kyrkou",
"E. G.",
""
]
] |
quant-ph/0605083
|
Matthew McDonnell
|
M.J. McDonnell, J.P. Home, D.M. Lucas, G. Imreh, B.C. Keitch, D.J.
Szwer, N.R. Thomas, S.C. Webster, D.N. Stacey and A.M. Steane
|
Long-lived mesoscopic entanglement outside the Lamb-Dicke regime
|
5 pages, 3 figures. Revised version after editor comments
|
Phys. Rev. Lett., v98, 063603 (2007)
|
10.1103/PhysRevLett.98.063603
| null |
quant-ph
| null |
We create entangled states of the spin and motion of a single $^{40}$Ca$^+$
ion in a linear ion trap. The motional part consists of coherent states of
large separation and long coherence time. The states are created by driving the
motion using counterpropagating laser beams. We theoretically study and
experimentally observe the behaviour outside the Lamb-Dicke regime, where the
trajectory in phase space is modified and the coherent states become squeezed.
We directly observe the modification of the return time of the trajectory, and
infer the squeezing. The mesoscopic entanglement is observed up to $\Delta
\alpha = 5.1$ with coherence time 170 microseconds and mean phonon excitation
$\nbar = 16$.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 15:23:52 GMT"
},
{
"version": "v2",
"created": "Thu, 2 Nov 2006 22:56:43 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"McDonnell",
"M. J.",
""
],
[
"Home",
"J. P.",
""
],
[
"Lucas",
"D. M.",
""
],
[
"Imreh",
"G.",
""
],
[
"Keitch",
"B. C.",
""
],
[
"Szwer",
"D. J.",
""
],
[
"Thomas",
"N. R.",
""
],
[
"Webster",
"S. C.",
""
],
[
"Stacey",
"D. N.",
""
],
[
"Steane",
"A. M.",
""
]
] |
quant-ph/0605084
|
Eugenio Roldan
|
German J. de Valcarcel, Eugenio Roldan, and F. Prati
|
Semiclassical Theory of Amplification and Lasing
|
Didactic article. 16 text pages plus 8 figures. Some typos corrected
|
Revista Mexicana de Fisica E 52 (2006) 198-214
| null | null |
quant-ph physics.optics
| null |
In this article we present a systematic derivation of the Maxwell-Bloch
equations describing amplification and laser action in a ring cavity. We derive
the Maxwell-Bloch equations for a two-level medium and discuss their
applicability to standard three- and four-level systems. After discusing
amplification, we consider lasing and pay special attention to the obtention of
the laser equations in the uniform field approximation. Finally, the connection
of the laser equations with the Lorenz model is considered.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 15:07:57 GMT"
},
{
"version": "v2",
"created": "Wed, 24 May 2006 12:40:48 GMT"
}
] | 2007-06-13T00:00:00 |
[
[
"de Valcarcel",
"German J.",
""
],
[
"Roldan",
"Eugenio",
""
],
[
"Prati",
"F.",
""
]
] |
quant-ph/0605085
|
Yuri Rostovtsev
|
Elena Kuznetsova, Yuri Rostovtsev, Nikolai G. Kalugin, Roman Kolesov,
Olga Kocharovskaya, Marlan O. Scully
|
Generation of coherent terahertz pulses in Ruby at room temperature
| null | null |
10.1103/PhysRevA.74.023819
| null |
quant-ph
| null |
We have shown that a coherently driven solid state medium can potentially
produce strong controllable short pulses of THz radiation. The high efficiency
of the technique is based on excitation of maximal THz coherence by applying
resonant optical pulses to the medium. The excited coherence in the medium is
connected to macroscopic polarization coupled to THz radiation. We have
performed detailed simulations by solving the coupled density matrix and
Maxwell equations. By using a simple $V$-type energy scheme for ruby, we have
demonstrated that the energy of generated THz pulses ranges from hundreds of
pico-Joules to nano-Joules at room temperature and micro-Joules at liquid
helium temperature, with pulse durations from picoseconds to tens of
nanoseconds. We have also suggested a coherent ruby source that lases on two
optical wavelengths and simultaneously generates THz radiation. We discussed
also possibilities of extension of the technique to different solid-state
materials.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 21:05:22 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Kuznetsova",
"Elena",
""
],
[
"Rostovtsev",
"Yuri",
""
],
[
"Kalugin",
"Nikolai G.",
""
],
[
"Kolesov",
"Roman",
""
],
[
"Kocharovskaya",
"Olga",
""
],
[
"Scully",
"Marlan O.",
""
]
] |
quant-ph/0605086
|
Graeme Smith
|
Debbie Leung and Graeme Smith
|
Communicating over adversarial quantum channels using quantum list codes
|
6 pages. Discussion expanded and more details provided in proofs. Far
less unclear than previous version
|
IEEE Trans. Info. Theory 54, 2, 883-887 (2008)
| null | null |
quant-ph
| null |
We study quantum communication in the presence of adversarial noise. In this
setting, communicating with perfect fidelity requires using a quantum code of
bounded minimum distance, for which the best known rates are given by the
quantum Gilbert-Varshamov (QGV) bound. By asking only for arbitrarily high
fidelity and allowing the sender and reciever to use a secret key with length
logarithmic in the number of qubits sent, we achieve a dramatic improvement
over the QGV rates. In fact, we find protocols that achieve arbitrarily high
fidelity at noise levels for which perfect fidelity is impossible. To achieve
such communication rates, we introduce fully quantum list codes, which may be
of independent interest.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 21:05:55 GMT"
},
{
"version": "v2",
"created": "Tue, 17 Apr 2007 18:02:10 GMT"
}
] | 2008-01-28T00:00:00 |
[
[
"Leung",
"Debbie",
""
],
[
"Smith",
"Graeme",
""
]
] |
quant-ph/0605087
|
Gui Lu Long
|
Gui Lu Long
|
Mathematical Theory of the Duality Computer in the Density Matrix
Formalism
|
3 pages. Typos corrected
|
Quantum Information Processing, 6, 49-54 (2007)
| null | null |
quant-ph
| null |
We give the mathematical theory of duality computer in the density matrix
formalism. This result complements the mathematical theory of duality computer
of Gudder in the pure state formalism.
|
[
{
"version": "v1",
"created": "Tue, 9 May 2006 22:26:37 GMT"
},
{
"version": "v2",
"created": "Thu, 11 May 2006 09:00:51 GMT"
},
{
"version": "v3",
"created": "Mon, 25 Sep 2006 00:22:06 GMT"
},
{
"version": "v4",
"created": "Wed, 28 Feb 2007 02:25:54 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Long",
"Gui Lu",
""
]
] |
quant-ph/0605088
|
Du Jian-Zhong
|
Jian-Zhong Du, Su-Juan Qin, Qiao-Yan Wen and Fu-Chen Zhu
|
Entanglement Split:Comment on ``Quantum secret sharing based on reusable
Greenberger-Horne-Zeilinger states as secure carriers'' [Phys. Rev. A 67,
044302 (2003)]
|
4 pages,no figures, subbmitted to Phys.Rev.A on December 16,2005
| null |
10.1103/PhysRevA.74.016301
| null |
quant-ph
| null |
In a recent paper [S. Bagherinezhad and V. Karimipour, Phys. Rev. A 67,
044302 (2003)], a quantum secret sharing protocol based on reusable GHZ states
was proposed. However, in this comment, it is shown that this protocol is
insecure because a cheater can gain all the secret bits before sharing, while
introducing one data bit error at most in the whole communication, which makes
the cheater avoid the detection by the communication parities.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 02:35:10 GMT"
},
{
"version": "v2",
"created": "Fri, 16 Jun 2006 07:47:54 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Du",
"Jian-Zhong",
""
],
[
"Qin",
"Su-Juan",
""
],
[
"Wen",
"Qiao-Yan",
""
],
[
"Zhu",
"Fu-Chen",
""
]
] |
quant-ph/0605089
|
Stefan Yoshi Buhmann
|
Ho Trung Dung, Stefan Yoshi Buhmann, Dirk-Gunnar Welsch
|
Local-field correction to the spontaneous decay rate of atoms embedded
in bodies of finite size
|
12 pages, 6 figures, minor additions
|
Physical Review A 74 (2), 023803 (2006)
|
10.1103/PhysRevA.74.023803
| null |
quant-ph
| null |
The influence of the size and shape of a dispersing and absorbing dielectric
body on the local-field corrected spontaneous-decay of an excited atom embedded
in the body is studied on the basis of the real-cavity model. By means of a
Born expansion of the Green tensor of the system it is shown that to linear
order in the susceptibility of the body the decay rate exactly follows Tomas's
formula found for the special case of an atom at the center of a homogeneous
dielectric sphere [Phys. Rev. A 63, 053811 (2001)]. It is further shown that
for an atom situated at the interior of an arbitrary dielectric body this
formula remains valid beyond the linear order. The case of an atom embedded in
a weakly polarizable sphere is discussed in detail.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 07:32:48 GMT"
},
{
"version": "v2",
"created": "Tue, 29 Aug 2006 16:00:54 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Dung",
"Ho Trung",
""
],
[
"Buhmann",
"Stefan Yoshi",
""
],
[
"Welsch",
"Dirk-Gunnar",
""
]
] |
quant-ph/0605090
|
Monique Combescure
|
M. Combescure (IPNL)
|
The Mutually Unbiased Bases Revisited
|
International Conference on Transport and Spectral Problems in
Quantum Mechanics held in Honor of Jean-Michel Combes, Cergy Pontoise :
France (2006)
| null | null | null |
quant-ph math-ph math.MP
| null |
The study of Mutually Unbiased Bases continues to be developed vigorously,
and presents several challenges in the Quantum Information Theory. Two
orthonormal bases in $\mathbb C^d, B {and} B'$ are said mutually unbiased if
$\forall b\in B, b'\in B'$ the scalar product $b\cdot b'$ has modulus
$d^{-1/2}$. In particular this property has been introduced in order to allow
an optimization of the measurement-driven quantum evolution process of any
state $\psi \in \mathbb C^d$ when measured in the mutually unbiased bases
$B\_{j} {of} \mathbb C^d$. At present it is an open problem to find the maximal
umber of mutually Unbiased Bases when $d$ is not a power of a prime number.
\noindent In this article, we revisit the problem of finding Mutually Unbiased
Bases (MUB's) in any dimension $d$. The method is very elementary, using the
simple unitary matrices introduced by Schwinger in 1960, together with their
diagonalizations. The Vandermonde matrix based on the $d$-th roots of unity
plays a major role. This allows us to show the existence of a set of 3 MUB's in
any dimension, to give conditions for existence of more than 3 MUB's for $d$
even or odd number, and to recover the known result of existence of $d+1$ MUB's
for $d$ a prime number. Furthermore the construction of these MUB's is very
explicit. As a by-product, we recover results about Gauss Sums, known in number
theory, but which have apparently not been previously derived from MUB
properties.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 09:01:27 GMT"
}
] | 2009-08-12T00:00:00 |
[
[
"Combescure",
"M.",
"",
"IPNL"
]
] |
quant-ph/0605091
|
Benedetto Militello
|
Benedetto Militello, Paolo Aniello and Antonino Messina
|
Perturbative Treatment of the Evolution Operator Associated with Raman
Couplings
|
Published in SIGMA (Symmetry, Integrability and Geometry: Methods and
Applications) at http://www.emis.de/journals/SIGMA/
|
SIGMA 2:050,2006
|
10.3842/SIGMA.2006.050
| null |
quant-ph
| null |
A novel perturbative treatment of the time evolution operator of a quantum
system is applied to the model describing a Raman-driven trapped ion in order
to obtain a suitable 'effective model'. It is shown that the associated
effective Hamiltonian describes the system dynamics up to a certain
transformation which may be interpreted as a 'dynamical dressing' of the
effective model.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 09:50:44 GMT"
}
] | 2008-12-19T00:00:00 |
[
[
"Militello",
"Benedetto",
""
],
[
"Aniello",
"Paolo",
""
],
[
"Messina",
"Antonino",
""
]
] |
quant-ph/0605092
|
Arvind
|
Arvind, Gurpreet Kaur, Geetu Narang
|
Optical implementations, oracle equivalence, and the Bernstein-Vazirani
algorithm
|
Published version reference added
|
JOSA B, Vol. 24, 221-225 (2007)
|
10.1364/JOSAB.24.000221
| null |
quant-ph
| null |
We describe a new implementation of the Bernstein-Vazirani algorithm which
relies on the fact that the polarization states of classical light beams can be
cloned. We explore the possibility of computing with waves and discuss a
classical optical model capable of implementing any algorithm (on $n$ qubits)
that does not involve entanglement. The Bernstein-Vazirani algorithm (with a
suitably modified oracle), wherein a hidden $n$ bit vector is discovered by one
oracle query as against $n$ oracle queries required classically, belongs to
this category. In our scheme, the modified oracle is also capable of computing
$f(x)$ for a given $x$, which is not possible with earlier versions used in
recent NMR and optics implementations of the algorithm.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 13:51:03 GMT"
},
{
"version": "v2",
"created": "Tue, 6 Mar 2007 09:49:10 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Arvind",
"",
""
],
[
"Kaur",
"Gurpreet",
""
],
[
"Narang",
"Geetu",
""
]
] |
quant-ph/0605093
|
Christopher E. Kuklewicz
|
Christopher E. Kuklewicz, Franco N. C. Wong, Jeffrey H. Shapiro
|
Time-bin modulated polarization-entangled biphotons from cavity-enhanced
down-conversion
|
4 pages, 5 figures
| null |
10.1103/PhysRevLett.97.223601
| null |
quant-ph
| null |
We have generated a new type of biphoton state by cavity-enhanced
down-conversion in a type-II phase-matched, periodically-poled KTiOPO_4 (PPKTP)
crystal. By introducing a weak intracavity birefringence, the
polarization-entangled output was modulated between the singlet and triplet
states according to the arrival-time difference of the signal and idler
photons. This cavity-enhanced biphoton source is spectrally bright, yielding a
single-mode fiber-coupled coincidence rate of 0.7 pairs/s per mW of pump power
per MHz of down-conversion bandwidth. Its novel biphoton behavior may be
utilized in sensitive measurements of weak intracavity birefringence.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 14:08:45 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Kuklewicz",
"Christopher E.",
""
],
[
"Wong",
"Franco N. C.",
""
],
[
"Shapiro",
"Jeffrey H.",
""
]
] |
quant-ph/0605094
|
Miguel Angel Martin-Delgado
|
H. Bombin, M.A. Martin-Delgado
|
Homological Error Correction: Classical and Quantum Codes
|
Revtex4 file
|
J.Math.Phys.48:052105,2007
|
10.1063/1.2731356
| null |
quant-ph cond-mat.other hep-th
| null |
We prove several theorems characterizing the existence of homological error
correction codes both classically and quantumly. Not every classical code is
homological, but we find a family of classical homological codes saturating the
Hamming bound. In the quantum case, we show that for non-orientable surfaces it
is impossible to construct homological codes based on qudits of dimension
$D>2$, while for orientable surfaces with boundaries it is possible to
construct them for arbitrary dimension $D$. We give a method to obtain planar
homological codes based on the construction of quantum codes on compact
surfaces without boundaries. We show how the original Shor's 9-qubit code can
be visualized as a homological quantum code. We study the problem of
constructing quantum codes with optimal encoding rate. In the particular case
of toric codes we construct an optimal family and give an explicit proof of its
optimality. For homological quantum codes on surfaces of arbitrary genus we
also construct a family of codes asymptotically attaining the maximum possible
encoding rate. We provide the tools of homology group theory for graphs
embedded on surfaces in a self-contained manner.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 16:57:48 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Bombin",
"H.",
""
],
[
"Martin-Delgado",
"M. A.",
""
]
] |
quant-ph/0605095
|
Hanna Krauter
|
Jacob Sherson, Hanna Krauter, Rasmus K. Olsson, Brian Julsgaard,
Klemens Hammerer, Ignacio Cirac and Eugene S. Polzik
|
Quantum teleportation between light and matter
|
23 pages, 8 figures, incl. supplementary information
|
Nature 443, 557-560 (5 October 2006)
|
10.1038/nature05136
| null |
quant-ph
| null |
Quantum teleportation is an important ingredient in distributed quantum
networks, and can also serve as an elementary operation in quantum computers.
Teleportation was first demonstrated as a transfer of a quantum state of light
onto another light beam; later developments used optical relays and
demonstrated entanglement swapping for continuous variables. The teleportation
of a quantum state between two single material particles (trapped ions) has now
also been achieved. Here we demonstrate teleportation between objects of a
different nature - light and matter, which respectively represent 'flying' and
'stationary' media. A quantum state encoded in a light pulse is teleported onto
a macroscopic object (an atomic ensemble containing 10^12 caesium atoms).
Deterministic teleportation is achieved for sets of coherent states with mean
photon number (n) up to a few hundred. The fidelities are 0.58+-0.02 for n=20
and 0.60+-0.02 for n=5 - higher than any classical state transfer can possibly
achieve. Besides being of fundamental interest, teleportation using a
macroscopic atomic ensemble is relevant for the practical implementation of a
quantum repeater. An important factor for the implementation of quantum
networks is the teleportation distance between transmitter and receiver; this
is 0.5 metres in the present experiment. As our experiment uses propagating
light to achieve the entanglement of light and atoms required for
teleportation, the present approach should be scalable to longer distances.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 15:22:50 GMT"
},
{
"version": "v2",
"created": "Mon, 23 Oct 2006 17:25:38 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Sherson",
"Jacob",
""
],
[
"Krauter",
"Hanna",
""
],
[
"Olsson",
"Rasmus K.",
""
],
[
"Julsgaard",
"Brian",
""
],
[
"Hammerer",
"Klemens",
""
],
[
"Cirac",
"Ignacio",
""
],
[
"Polzik",
"Eugene S.",
""
]
] |
quant-ph/0605096
|
Subhash Kak
|
Subhash Kak
|
Quantum Information and Entropy
|
21 pages, 3 figures
|
International Journal of Theoretical Physics, vol. 46, pp.
860-876, 2007.
|
10.1007/s10773-006-9245-6
| null |
quant-ph cs.IT math.IT
| null |
Thermodynamic entropy is not an entirely satisfactory measure of information
of a quantum state. This entropy for an unknown pure state is zero, although
repeated measurements on copies of such a pure state do communicate
information. In view of this, we propose a new measure for the informational
entropy of a quantum state that includes information in the pure states and the
thermodynamic entropy. The origin of information is explained in terms of an
interplay between unitary and non-unitary evolution. Such complementarity is
also at the basis of the so-called interaction-free measurement.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 15:40:09 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Kak",
"Subhash",
""
]
] |
quant-ph/0605097
|
A. V. Kuzmin
|
A.V. Kuzmin
|
On connection between purity and fidelity of quantum channels
|
8 pages
| null | null | null |
quant-ph
| null |
Quantum channels depending on a number of classical control parameters are
considered. Assuming the stochastic fluctuations of the control parameters in
the small errors limit it is shown that the channel fidelity is equal to the
average value of the channel purities calculated in the cases of the control
errors presence and absence respectively. The result validity is demonstrated
on two particular examples, namely, one-qubit quantum gates implemented in the
framework of the ion trap setup and the single qubit anisotropic depolarizing
quantum channel.
|
[
{
"version": "v1",
"created": "Wed, 10 May 2006 15:59:07 GMT"
},
{
"version": "v2",
"created": "Mon, 15 May 2006 09:17:25 GMT"
},
{
"version": "v3",
"created": "Tue, 16 May 2006 12:22:17 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Kuzmin",
"A. V.",
""
]
] |
quant-ph/0605098
|
Alex Kuzmich
|
D. N. Matsukevich, T. Chaneliere, S. D. Jenkins, S.-Y. Lan, T. A. B.
Kennedy, and A. Kuzmich
|
Deterministic single photons via conditional quantum evolution
|
5 pages, 3 figures
|
Physical Review Letters 97, 013601 (2006)
|
10.1103/PhysRevLett.97.013601
| null |
quant-ph
| null |
A source of deterministic single photons is proposed and demonstrated by the
application of a measurement-based feedback protocol to a heralded single
photon source consisting of an ensemble of cold rubidium atoms. Our source is
stationary and produces a photoelectric detection record with sub-Poissonian
statistics.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 02:39:28 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Matsukevich",
"D. N.",
""
],
[
"Chaneliere",
"T.",
""
],
[
"Jenkins",
"S. D.",
""
],
[
"Lan",
"S. -Y.",
""
],
[
"Kennedy",
"T. A. B.",
""
],
[
"Kuzmich",
"A.",
""
]
] |
quant-ph/0605099
|
Vahid Karimipour
|
V. Karimipour
|
Reply to Entanglement split: "Comment on quantum secret sharing based on
reusable Greenbergr-Horne-Zeilinger states as secure carriers"
|
5 pages, 1 figure
|
Phys. Rev. A 74, 016302 (2006).
|
10.1103/PhysRevA.74.016302
| null |
quant-ph
| null |
In a recent comment, it has been shown that in a quantum secret sharing
protocol proposed in [S. Bagherinezhad, V. Karimipour, Phys. Rev. {\bf A}, 67,
044302, (2003)], one of the receivers can cheat by splitting the entanglement
of the carrier and intercepting the secret, without being detected. In this
reply we show that a simple modification of the protocol prevents the receivers
from this kind of cheating.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 06:03:09 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Karimipour",
"V.",
""
]
] |
quant-ph/0605100
|
Stojan Rebic
|
S. Rebic, C. Ottaviani, G. Di Giuseppe, D. Vitali and P. Tombesi
|
Assessment of a quantum phase gate operation based on nonlinear optics
|
12 pages, 15 figures
|
Phys Rev A 74, 032301 (2006)
|
10.1103/PhysRevA.74.032301
| null |
quant-ph
| null |
We analyze in detail the proposal for a two-qubit gate for travelling
single-photon qubits recently presented by C. Ottaviani \emph{et al}. [Phys.
Rev. A \textbf{73}, 010301(R) (2006)]. The scheme is based on an ensemble of
five-level atoms coupled to two quantum and two classical light fields. The two
quantum fields undergo cross-phase modulation induced by electromagnetically
induced transparency. The performance of this two-qubit quantum phase gate for
travelling single-photon qubits is thoroughly examined in the steady-state and
transient regimes, by means of a full quantum treatment of the system dynamics.
In the steady-state regime, we find a general trade-off between the size of the
conditional phase shift and the fidelity of the gate operation. However, this
trade-off can be bypassed in the transient regime, where a satisfactory gate
operation is found to be possible, significantly reducing the gate operation
time.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 10:38:19 GMT"
},
{
"version": "v2",
"created": "Mon, 4 Sep 2006 10:48:43 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Rebic",
"S.",
""
],
[
"Ottaviani",
"C.",
""
],
[
"Di Giuseppe",
"G.",
""
],
[
"Vitali",
"D.",
""
],
[
"Tombesi",
"P.",
""
]
] |
quant-ph/0605101
|
Wang Zhi Yong
|
Zhi-Yong Wang, Cai-Dong Xiong
|
On the Generator of Lorentz Boost
|
9 pages
|
Chin. Phys.15, No10, 2223-2227(2006)
|
10.1088/1009-1963/15/10/006
| null |
quant-ph
| null |
Traditionally, the theory related to the spatial angular momentum has been
studied completely, while the investigation in the generator of Lorentz boost
is inadequate. In this paper we show that the generator of Lorentz boost has a
nontrivial physical significance, it endows a charged system with an electric
moment, and has an important significance for the electrical manipulations of
electron spin in spintronics. An alternative treatment and interpretation for
the traditional Darwin term and spin-orbit coupling are given.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 10:51:23 GMT"
},
{
"version": "v2",
"created": "Fri, 12 May 2006 14:14:04 GMT"
},
{
"version": "v3",
"created": "Wed, 7 Jun 2006 11:14:09 GMT"
},
{
"version": "v4",
"created": "Fri, 10 Nov 2006 13:34:07 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Wang",
"Zhi-Yong",
""
],
[
"Xiong",
"Cai-Dong",
""
]
] |
quant-ph/0605102
|
Wang Zhi Yong
|
Zhi-Yong Wang, Cai-Dong Xiong, Ole Keller
|
First Quantized Theory of the Photon
|
Detailed version by adding the last paragraph as well as Appendix A
and B
|
Chin. Phys. Lett. 24, 418 (2007)
|
10.1088/0256-307X/24/2/032
| null |
quant-ph
| null |
In near-field optics and optical tunneling theory, photon wave mechanics,
i.e., the first quantized theory of the photon, allows us to address the
spatial field localization problem in a flexible manner which links smoothly to
classical electromagnetics. In this letter, photon wave mechanics is developed
in a rigorous and unified way, based on which field quantization is obtained in
a new way.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 10:57:46 GMT"
},
{
"version": "v2",
"created": "Wed, 24 May 2006 13:41:00 GMT"
},
{
"version": "v3",
"created": "Thu, 25 May 2006 08:36:41 GMT"
},
{
"version": "v4",
"created": "Mon, 26 Jun 2006 13:17:20 GMT"
},
{
"version": "v5",
"created": "Tue, 8 Aug 2006 16:24:50 GMT"
},
{
"version": "v6",
"created": "Sun, 1 Oct 2006 12:17:26 GMT"
},
{
"version": "v7",
"created": "Tue, 9 Jan 2007 15:09:18 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Wang",
"Zhi-Yong",
""
],
[
"Xiong",
"Cai-Dong",
""
],
[
"Keller",
"Ole",
""
]
] |
quant-ph/0605103
|
Armin Uhlmann
|
Armin Uhlmann
|
On Concurrence and Entanglement of Rank Two Channels
|
20 pages. An appendix is added. An error in (45) - (47) and known (to
me) misspellings are corrected
|
Open Sys. & Information Dynamics 12 (2005) 1 - 14
| null | null |
quant-ph
| null |
Concurrence and further entanglement quantifyers can be computed explicitly
for channels of rank two if representable by just two Kraus operators. Almost
all details are available for the subclass of rank two 1-qubit-channels. There
is a simple geometric picture beyond, explaining nicely the role of
anti-linearity.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 17:25:56 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Uhlmann",
"Armin",
""
]
] |
quant-ph/0605104
|
Xiujun Wang
|
Xiao Zheng, Fan Wang, and GuanHua Chen
|
Existence of A Rigorous Density-Functional Theory for Open Electronic
Systems
|
5 pages, 1 figure
| null | null | null |
quant-ph
| null |
We prove that the electron density function of a real physical system can be
uniquely determined by its values on any finite subsystem. This establishes the
existence of a rigorous density-functional theory for any open electronic
system. By introducing a new density functional for dissipative interactions
between the reduced system and its environment, we subsequently develop a
time-dependent density-functional theory which depends in principle only on the
electron density of the reduced system.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 11:59:44 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Zheng",
"Xiao",
""
],
[
"Wang",
"Fan",
""
],
[
"Chen",
"GuanHua",
""
]
] |
quant-ph/0605105
|
W. M. Stuckey
|
W.M. Stuckey, Michael Silberstein and Michael Cifone
|
Quantum to Classical Transition per the Relational Blockworld
|
40 pages of text, 16 figures. Submitted to Foundations of Physics.
Two references added
| null | null | null |
quant-ph
| null |
The transition from the quantum realm to the classical realm is described in
the context of the Relational Blockworld (RBW) interpretation of
non-relativistic quantum mechanics. We first introduce RBW, discuss its
philosophical implications and provide an example of its explanatory
methodology via the so-called "quantum liar experiment." We then provide a
simple example of a quantum to classical transition in this context using a
gedanken twin-slit experiment. We conclude by speculating on the extrapolation
of RBW to quantum field theory, suggesting the need for a new principle of
physics based in spatiotemporal relationalism. Accordingly, RBW suggests a
novel approach to new physics which supplies a means for its falsification.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 14:47:31 GMT"
},
{
"version": "v2",
"created": "Mon, 22 May 2006 15:07:53 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Stuckey",
"W. M.",
""
],
[
"Silberstein",
"Michael",
""
],
[
"Cifone",
"Michael",
""
]
] |
quant-ph/0605106
|
Marco Lucamarini
|
M. Lucamarini, A. Cere', G. Di Giuseppe, S. Mancini, D. Vitali and P.
Tombesi
|
Two-way Protocol for Quantum Cryptography with Imperfect Devices
|
10 pages, 3 figures. Uses OSID style
|
Open Syst. Inf. Dyn. 14, 169-178 (2007)
| null | null |
quant-ph
| null |
The security of a deterministic quantum scheme for communication, namely the
LM05 [1], is studied in presence of a lossy channel under the assumption of
imperfect generation and detection of single photons. It is shown that the
scheme allows for a rate of distillable secure bits higher than that pertaining
to BB84 [2]. We report on a first implementation of LM05 with weak pulses.
|
[
{
"version": "v1",
"created": "Thu, 11 May 2006 14:48:52 GMT"
}
] | 2008-07-03T00:00:00 |
[
[
"Lucamarini",
"M.",
""
],
[
"Cere'",
"A.",
""
],
[
"Di Giuseppe",
"G.",
""
],
[
"Mancini",
"S.",
""
],
[
"Vitali",
"D.",
""
],
[
"Tombesi",
"P.",
""
]
] |
quant-ph/0605107
|
Xiang Hao
|
Xiang Hao, Shiqun Zhu
|
Entanglement in a Spin-$s$ Antiferromagnetic Heisenberg Chain
|
12 pages; 3 figures
| null | null | null |
quant-ph
| null |
The entanglement in a general Heisenberg antiferromagnetic chain of arbitrary
spin-$s$ is investigated. The entanglement is witnessed by the thermal energy
which equals to the minimum energy of any separable state. There is a
characteristic temperature below that an entangled thermal state exists. The
characteristic temperature for thermal entanglement is increased with spin $s$.
When the total number of lattice is increased, the characteristic temperature
decreases and then approaches a constant. This effect shows that the thermal
entanglement can be detected in a real solid state system of larger number of
lattices for finite temperature. The comparison of negativity and entanglement
witness is obtained from the separability of the unentangled states. It is
found that the thermal energy provides a sufficient condition for the existence
of the thermal entanglement in a spin-$s$ antiferromagnetic Heisenberg chain.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 02:24:28 GMT"
}
] | 2011-02-19T00:00:00 |
[
[
"Hao",
"Xiang",
""
],
[
"Zhu",
"Shiqun",
""
]
] |
quant-ph/0605108
|
Nigum Arshed
|
Nigum Arshed and A. H. Toor
|
Entanlement-Assisted Classical Capacity of Quantum Channels with
Correlated Noise
|
8 Pages, 2 Figures
|
Phys. Rev. A 73, 014304 (2006)
|
10.1103/PhysRevA.73.014304
| null |
quant-ph
| null |
We calculate the entanglement-assisted classical capacity of symmetric and
asymmetric Pauli channels where two consecutive uses of the channels are
correlated. It is evident from our study that in the presence of memory, a
higher amount of classical information is transmitted over quantum channels if
there exists prior entanglement as compared to product and entangled state
coding.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 10:54:56 GMT"
},
{
"version": "v2",
"created": "Sat, 13 May 2006 10:54:59 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Arshed",
"Nigum",
""
],
[
"Toor",
"A. H.",
""
]
] |
quant-ph/0605109
|
Gaston Garcia-Calderon
|
Gaston Garcia-Calderon, Jorge Villavicencio
|
Full time nonexponential decay in double-barrier quantum structures
|
6 pages, 5 figures
|
Phys. Rev. A 73, 062115 (2006)
|
10.1103/PhysRevA.73.062115
| null |
quant-ph cond-mat.other
| null |
We examine an analytical expression for the survival probability for the time
evolution of quantum decay to discuss a regime where quantum decay is
nonexponential at all times. We find that the interference between the
exponential and nonexponential terms of the survival amplitude modifies the
usual exponential decay regime in systems where the ratio of the resonance
energy to the decay width, is less than 0.3. We suggest that such regime could
be observed in semiconductor double-barrier resonant quantum structures with
appropriate parameters.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 11:02:26 GMT"
}
] | 2013-03-01T00:00:00 |
[
[
"Garcia-Calderon",
"Gaston",
""
],
[
"Villavicencio",
"Jorge",
""
]
] |
quant-ph/0605110
|
Ali Mostafazadeh
|
Ali Mostafazadeh
|
Is Weak Pseudo-Hermiticity Weaker than Pseudo-Hermiticity?
|
published version, 10 pages
|
J. Math. Phys. 47, 092101 (2006)
|
10.1063/1.2338144
| null |
quant-ph
| null |
For a weakly pseudo-Hermitian linear operator, we give a spectral condition
that ensures its pseudo-Hermiticity. This condition is always satisfied
whenever the operator acts in a finite-dimensional Hilbert space. Hence weak
pseudo-Hermiticity and pseudo-Hermiticity are equivalent in finite-dimensions.
This equivalence extends to a much larger class of operators. Quantum systems
whose Hamiltonian is selected from among these operators correspond to
pseudo-Hermitian quantum systems possessing certain symmetries.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 13:34:48 GMT"
},
{
"version": "v2",
"created": "Thu, 15 Jun 2006 11:33:02 GMT"
},
{
"version": "v3",
"created": "Tue, 28 Nov 2006 08:54:59 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Mostafazadeh",
"Ali",
""
]
] |
quant-ph/0605111
|
Yasaman Soudagar Ms.
|
Yasaman Soudagar, Felix Bussieres, Guido Berlin, Suzanne Lacroix, Jose
M. Fernandez, Nicolas Godbout
|
Cluster state quantum computing in optical fibers
|
6 pages, 11 figures, submitted to the Optical Quantum-Information
Science focus issue of JOSA B
| null |
10.1364/JOSAB.24.000226
| null |
quant-ph
| null |
A scheme for the implementation of the cluster state model of quantum
computing in optical fibers, which enables the feedforward feature, is
proposed. This scheme uses the time-bin encoding of qubits. Following
previously suggested methods of applying arbitrary one-qubit gates in optical
fibers, two different ways for the realization of fusion gate types I and II
for cluster production are proposed: a fully time-bin based encoding scheme and
a combination of time-bin and polarization based encoding scheme. Also the
methods of measurement in any desired bases for the purpose of the processing
of cluster state computing for both these encodings are explained.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 15:38:41 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Soudagar",
"Yasaman",
""
],
[
"Bussieres",
"Felix",
""
],
[
"Berlin",
"Guido",
""
],
[
"Lacroix",
"Suzanne",
""
],
[
"Fernandez",
"Jose M.",
""
],
[
"Godbout",
"Nicolas",
""
]
] |
quant-ph/0605112
|
Arnau Riera
|
A. Riera and J. I. Latorre
|
Area law and vacuum reordering in harmonic networks
|
15 pages, 6 figures; typos corrected
|
Phys.Rev.A74:052326,2006
|
10.1103/PhysRevA.74.052326
| null |
quant-ph cond-mat.other hep-th
| null |
We review a number of ideas related to area law scaling of the geometric
entropy from the point of view of condensed matter, quantum field theory and
quantum information. An explicit computation in arbitrary dimensions of the
geometric entropy of the ground state of a discretized scalar free field theory
shows the expected area law result. In this case, area law scaling is a
manifestation of a deeper reordering of the vacuum produced by majorization
relations. Furthermore, the explicit control on all the eigenvalues of the
reduced density matrix allows for a verification of entropy loss along the
renormalization group trajectory driven by the mass term. A further result of
our computation shows that single-copy entanglement also obeys area law
scaling, majorization relations and decreases along renormalization group
flows.
|
[
{
"version": "v1",
"created": "Fri, 12 May 2006 19:46:37 GMT"
},
{
"version": "v2",
"created": "Mon, 29 May 2006 09:11:16 GMT"
},
{
"version": "v3",
"created": "Mon, 26 Jun 2006 10:47:30 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Riera",
"A.",
""
],
[
"Latorre",
"J. I.",
""
]
] |
quant-ph/0605113
|
Andrei Klimov B.
|
A.B. Klimov, C. Munoz, J.L. Romero
|
Geometric approach to the discrete Wigner function
|
25 p. Extended version de short course given in School on Quantum
Optics and Quantum Information, November 21-25, 2005, Las trancas, Chillan,
Chile
| null | null | null |
quant-ph
| null |
We analyze the Wigner function constructed on the basis of the discrete
rotation and displacement operators labeled with elements of the underlying
finite field. We separately discuss the case of odd and even characteristics
and analyze the algebraic origin of the non uniqueness of the representation of
the Wigner function. Explicit expressions for the Wigner kernel are given in
both cases.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 00:00:01 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Klimov",
"A. B.",
""
],
[
"Munoz",
"C.",
""
],
[
"Romero",
"J. L.",
""
]
] |
quant-ph/0605114
|
Mark Kasevich
|
Ruquan Wang, Mingchang Liu, Francesco Minardi and Mark Kasevich
|
Reaching 7Li BEC with a Mini-Trap
|
7 pages, 10 figures
| null | null | null |
quant-ph
| null |
A novel mm-scale Ioffe-Pritchard trap is used to achieve Bose-Einstein
condensation in 7Li. The trap employs free-standing copper coils integrated
onto a direct-bond copper surface electrode structure. The trap achieves a
radial magnetic gradient of 420 G/cm, an axial oscillation frequency of 50 Hz
and a trap depth of 66 G with a 100 A drive current and 7 W total power
dissipation.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 01:00:03 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Wang",
"Ruquan",
""
],
[
"Liu",
"Mingchang",
""
],
[
"Minardi",
"Francesco",
""
],
[
"Kasevich",
"Mark",
""
]
] |
quant-ph/0605115
|
S\'ergio Morelh\~ao L
|
S\'ergio L. Morelh\~ao and Andr\'e V. Perrotta
|
General recursive solution for one dimensional quantum potentials: a
simple tool for applied physics
|
Final version to appear in the Brazilian Magazine of Physics Teaching
(http://www.sbfisica.org.br/noticias/publicacoes.shtml)
| null | null | null |
quant-ph
| null |
A revision of the recursive method proposed by S.A. Shakir [Am. J.Phys.
\textbf{52}, 845 (1984)] to solve bound eigenvalues of the Schr\"odinger
equation is presented. Equations are further simplified and generalized for
computing wave functions of any given one-dimensional potential, providing
accurate solutions not only for bound states but also for scattering and
resonant states, as demonstrated here for a few examples.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 18:47:39 GMT"
},
{
"version": "v2",
"created": "Tue, 15 May 2007 04:44:17 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Morelhão",
"Sérgio L.",
""
],
[
"Perrotta",
"André V.",
""
]
] |
quant-ph/0605116
|
Roald Ekholdt
|
Roald Ekholdt
|
An interpretation of quantum mechanics based on a waveguide analogy
|
12 pages
| null | null | null |
quant-ph physics.hist-ph
| null |
Based on an observation that the basic mode of a common microwave waveguide
is a solution to the Klein-Gordon equation, quantum mechanics is modeled as the
wave-function propagated inside a waveguide. The guide width is determined by
the rest-energy and the potential energy. Moreover, a geometrical optics model
of the propagation illustrates how the width as a function of distance
determines the velocity and accelerations of the particle. The model entails
the disappearance of action-at-a-distance problem, and that interactions are
conveyed via the potential, i.e. by photons.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 06:59:36 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Ekholdt",
"Roald",
""
]
] |
quant-ph/0605117
|
Paola Campanale
|
P. Campanale, D. Picca
|
The one-way CNOT simulation
|
7 pages, 2 figures
| null |
10.1134/S1054660X06110107
| null |
quant-ph
| null |
In this paper we present the complete simulation of the quantum logic CNOT
gate in the one-way model, that consists entirely of one-qubit measurements on
a particular class of entangled states.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 09:20:21 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Campanale",
"P.",
""
],
[
"Picca",
"D.",
""
]
] |
quant-ph/0605118
|
Giovanni Di Giuseppe
|
A. Cere', M. Lucamarini, G. Di Giuseppe and P. Tombesi
|
Experimental Test of Two-way Quantum Key Distribution in Presence of
Controlled Noise
|
4 pages, 3 figures
|
Phys. Rev. Lett. 96, 200501 (2006)
|
10.1103/PhysRevLett.96.200501
| null |
quant-ph
| null |
We describe the experimental test of a quantum key distribution performed
with a two-way protocol without using entanglement. An individual incoherent
eavesdropping is simulated and induces a variable amount of noise on the
communication channel. This allows a direct verification of the agreement
between theory and practice.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 12:08:09 GMT"
}
] | 2009-09-14T00:00:00 |
[
[
"Cere'",
"A.",
""
],
[
"Lucamarini",
"M.",
""
],
[
"Di Giuseppe",
"G.",
""
],
[
"Tombesi",
"P.",
""
]
] |
quant-ph/0605119
|
Pedro Garcia de Leon
|
Pedro L. Garc\'ia de Le\'on and Jean-Pierre Gazeau
|
Coherent state quantization and phase operator
|
10 pages
|
Physics Letters A 361 (2007) 301-304
|
10.1016/j.physleta.2006.09.065
| null |
quant-ph
| null |
Phase operators are constructed using a Klauder-Berezin coherent state
quantization in finite Hilbert subspaces of the Hilbert space of Fourier
series. The study of infinite dimensional limits of mean values of some
observables phase leads towards a simpler convergence to the canonical
commutation relations.
|
[
{
"version": "v1",
"created": "Sat, 13 May 2006 20:35:34 GMT"
},
{
"version": "v2",
"created": "Thu, 22 Feb 2007 17:12:23 GMT"
}
] | 2016-08-16T00:00:00 |
[
[
"de León",
"Pedro L. García",
""
],
[
"Gazeau",
"Jean-Pierre",
""
]
] |
quant-ph/0605120
|
Edward R. Floyd
|
Edward R. Floyd
|
Interference, reduced action, and trajectories
|
12 pages text, 5 figures. Typos corrected. Author's final submission.
A companion paper to "Welcher Weg? A trajectory representation of a quantum
Young's diffraction experiment", quant-ph/0605121. Keywords: interference,
nonlocality, trajectory representation, entanglement, dwell time, determinism
|
Found.Phys.37:1386-1402,2007
|
10.1007/s10701-007-9154-4
| null |
quant-ph
| null |
Instead of investigating the interference between two stationary, rectilinear
wave functions in a trajectory representation by examining the two rectilinear
wave functions individually, we examine a dichromatic wave function that is
synthesized from the two interfering wave functions. The physics of
interference is contained in the reduced action for the dichromatic wave
function. As this reduced action is a generator of the motion for the
dichromatic wave function, it determines the dichromatic wave function's
trajectory. The quantum effective mass renders insight into the behavior of the
trajectory. The trajectory in turn renders insight into quantum nonlocality.
|
[
{
"version": "v1",
"created": "Sun, 14 May 2006 14:05:07 GMT"
},
{
"version": "v2",
"created": "Mon, 2 Jul 2007 05:04:54 GMT"
},
{
"version": "v3",
"created": "Sat, 13 Oct 2007 18:16:02 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Floyd",
"Edward R.",
""
]
] |
quant-ph/0605121
|
Edward R. Floyd
|
Edward R. Floyd
|
Welcher Weg? A trajectory representation of a quantum Young's
diffraction experiment
|
12 pages LaTeX2e, 9 figures. Typos corrected. Author's final
submission. A companion paper to "Interference, reduced action, and
trajectories", quant-ph/0605120. Keywords: interference, Young's experiment,
entanglement, nonlocality, trajectory representation, determinism
|
Found.Phys.37:1403-1420,2007
|
10.1007/s10701-007-9155-3
| null |
quant-ph
| null |
The double slit problem is idealized by simplifying each slit by a point
source. A composite reduced action for the two correlated point sources is
developed. Contours of the reduced action, trajectories and loci of transit
times are developed in the region near the two point sources. The trajectory
through any point in Euclidian 3-space also passes simultaneously through both
point sources.
|
[
{
"version": "v1",
"created": "Sun, 14 May 2006 14:17:16 GMT"
},
{
"version": "v2",
"created": "Mon, 2 Jul 2007 05:17:21 GMT"
},
{
"version": "v3",
"created": "Sat, 13 Oct 2007 18:22:26 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Floyd",
"Edward R.",
""
]
] |
quant-ph/0605122
|
Julien Laurat
|
Julien Laurat, Hugues de Riedmatten, Daniel Felinto, Chin-wen Chou,
Erik Schomburg, H. Jeff Kimble
|
Efficient retrieval of a single excitation stored in an atomic ensemble
| null |
Opt. Express 14, 6912-6918 (2006)
|
10.1364/OE.14.006912
| null |
quant-ph
| null |
We report significant improvements in the retrieval efficiency of a single
excitation stored in an atomic ensemble and in the subsequent generation of
strongly correlated pairs of photons. A 50% probability to transform the stored
excitation into one photon in a well-defined spatio-temporal mode at the output
of the ensemble is demonstrated. These improvements are illustrated by the
generation of high-quality heralded single photons with a suppression of the
two-photon component below 1% of the value for a coherent state. A broad
characterization of our system is performed for different parameters in order
to provide input for the future design of realistic quantum networks.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 06:00:09 GMT"
},
{
"version": "v2",
"created": "Wed, 5 Jul 2006 21:24:01 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Laurat",
"Julien",
""
],
[
"de Riedmatten",
"Hugues",
""
],
[
"Felinto",
"Daniel",
""
],
[
"Chou",
"Chin-wen",
""
],
[
"Schomburg",
"Erik",
""
],
[
"Kimble",
"H. Jeff",
""
]
] |
quant-ph/0605123
|
Rajesh R. Parwani
|
R. Parwani and H. S. Tan
|
Exact Solutions of a Non-Polynomially Nonlinear Schrodinger Equation
|
11 pages
|
Phys.Lett. A363 (2007) 197-201
|
10.1016/j.physleta.2006.11.002
| null |
quant-ph hep-th nlin.PS
| null |
A nonlinear generalisation of Schrodinger's equation had previously been
obtained using information-theoretic arguments. The nonlinearities in that
equation were of a nonpolynomial form, equivalent to the occurence of
higher-derivative nonlinear terms at all orders. Here we construct some exact
solutions to that equation in 1+1 dimensions. On the half-line, the solutions
resemble exponentially damped Bloch waves even though no external periodic
potential is included: the periodicity is induced by the nonpolynomiality. The
solutions are nonperturbative as they do not reduce to solutions of the linear
theory in the limit that the nonlinearity parameter vanishes. An intriguing
feature of the solutions is their infinite degeneracy: for a given energy,
there exists a very large arbitrariness in the normalisable wavefunctions. We
also consider solutions to a q-deformed version of the nonlinear equation and
discuss a natural discretisation implied by the nonpolynomiality. Finally, we
contrast the properties of our solutions with other solutions of nonlinear
Schrodinger equations in the literature and suggest some possible applications
of our results in the domains of low-energy and high-energy physics.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 07:18:19 GMT"
},
{
"version": "v2",
"created": "Thu, 9 Nov 2006 05:55:40 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Parwani",
"R.",
""
],
[
"Tan",
"H. S.",
""
]
] |
quant-ph/0605124
|
Yuri Malakyan
|
N.Sisakyan and Yu.Malakyan
|
Preparation of a Single Photon in Time-bin Entangled States via Photon
Parametric Interaction
|
4 pages, 2 figures
| null | null | null |
quant-ph
| null |
A novel method for preparation of a single photon in temporally-delocalized
entangled modes is proposed and analyzed. We show that two single-photon pulses
propagating in a driven nonabsorbing medium with different group velocities are
temporally split under parametric interaction into well-separated pulses. In
consequence, the single-photon "time-bin-entangled" states are generated with a
programmable entanglement easily controlled by driving field intensity. The
experimental study of nonclassical features and nonlocality of generated states
by means of balanced homodyne tomography is discussed.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 09:09:59 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Sisakyan",
"N.",
""
],
[
"Malakyan",
"Yu.",
""
]
] |
quant-ph/0605125
|
Jukka Huhtam\"aki
|
J. A. M. Huhtam\"aki (1), M. M\"ott\"onen (2), T. Isoshima (3), V.
Pietil\"a (1), and S. M. M. Virtanen (1) ((1) Laboratory of Physics, Helsinki
University of Technology, Finland, (2) Low Temperature Laboratory, Helsinki
University of Technology, Finland, (3) Institute of Physics, Academia Sinica,
Taiwan)
|
Splitting times of doubly quantized vortices in dilute Bose-Einstein
condensates
|
5 pages, 5 figures
|
Phys. Rev. Lett. 97, 110406 (2006)
|
10.1103/PhysRevLett.97.110406
| null |
quant-ph cond-mat.stat-mech
| null |
Recently, the splitting of a topologically created doubly quantized vortex
into two singly quantized vortices was experimentally investigated in dilute
atomic cigar-shaped Bose-Einstein condensates [Y. Shin et al., Phys. Rev. Lett.
93, 160406 (2004)]. In particular, the dependency of the splitting time on the
peak particle density was studied. We present results of theoretical
simulations which closely mimic the experimental set-up. Contrary to previous
theoretical studies, claiming that thermal excitations are the essential
mechanism in initiating the splitting, we show that the combination of
gravitational sag and time dependency of the trapping potential alone suffices
to split the doubly quantized vortex in time scales which are in good agreement
with the experiments. We also study the dynamics of the resulting singly
quantized vortices which typically intertwine--especially, a peculiar vortex
chain structure appears for certain parameter values.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 13:45:45 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Huhtamäki",
"J. A. M.",
""
],
[
"Möttönen",
"M.",
""
],
[
"Isoshima",
"T.",
""
],
[
"Pietilä",
"V.",
""
],
[
"Virtanen",
"S. M. M.",
""
]
] |
quant-ph/0605126
|
Oscar Dahlsten Mr
|
R.Oliveira, O.C.O.Dahlsten and M.B.Plenio
|
Efficient Generation of Generic Entanglement
|
Replaced with version similar to the published. Added journal
reference.
|
Phys. Rev. Lett. 98, 130502 (2007)
|
10.1103/PhysRevLett.98.130502
| null |
quant-ph
| null |
We find that generic entanglement is physical, in the sense that it can be
generated in polynomial time from two-qubit gates picked at random. We prove as
the main result that such a process generates the average entanglement of the
uniform (Haar) measure in at most $O(N^3)$ steps for $N$ qubits. This is
despite an exponentially growing number of such gates being necessary for
generating that measure fully on the state space. Numerics furthermore show a
variation cut-off allowing one to associate a specific time with the
achievement of the uniform measure entanglement distribution. Various
extensions of this work are discussed. The results are relevant to entanglement
theory and to protocols that assume generic entanglement can be achieved
efficiently.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 16:54:15 GMT"
},
{
"version": "v2",
"created": "Tue, 3 Apr 2007 19:49:01 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Oliveira",
"R.",
""
],
[
"Dahlsten",
"O. C. O.",
""
],
[
"Plenio",
"M. B.",
""
]
] |
quant-ph/0605127
|
Ting Gao
|
Mei-Yu Wang, Feng-Li Yan
|
Conclusive quantum state classification
|
4 pages, no figure
| null | null | null |
quant-ph
| null |
In this paper, we have considered the problem of general conclusive quantum
state classification; the necessary and sufficient conditions for the existence
of conclusive classification strategies have also been presented. Moreover, we
have given the upper bound for the maximal success probability.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 14:47:46 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Wang",
"Mei-Yu",
""
],
[
"Yan",
"Feng-Li",
""
]
] |
quant-ph/0605128
|
Nicolas Treps
|
German J. De Valcarcel (LKB - Jussieu), Giuseppe Patera (LKB -
Jussieu), Nicolas Treps (LKB - Jussieu), Claude Fabre (LKB - Jussieu)
|
Squeezing frequency combs
| null | null | null | null |
quant-ph
| null |
We have developed the full theory of a synchronously pumped type I optical
parametric oscillator (SPOPO). We derive expressions for the oscillation
threshold and the characteristics of the generated mode-locked signal beam. We
calculate the output quantum fluctuations of the device, and find that, in the
degenerate case (coincident signal and idler set of frequencies), perfect
squeezing is obtained when one approaches threshold from below for a well
defined "super-mode', or frequency comb, consisting of a coherent linear
superposition of signal modes of different frequencies which are resonant in
the cavity.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 18:58:52 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"De Valcarcel",
"German J.",
"",
"LKB - Jussieu"
],
[
"Patera",
"Giuseppe",
"",
"LKB -\n Jussieu"
],
[
"Treps",
"Nicolas",
"",
"LKB - Jussieu"
],
[
"Fabre",
"Claude",
"",
"LKB - Jussieu"
]
] |
quant-ph/0605129
|
Homa Taati Asil
|
S. Nasiri, Y. Sobouti, and F. Taati
|
Phase Space Quantum Mechanics - Direct
|
16 pages
|
JOURNAL OF MATHEMATICAL PHYSICS 47, 092106 2006
|
10.1063/1.2345109
| null |
quant-ph
| null |
Conventional approach to quantum mechanics in phase space, (q,p), is to take
the operator based quantum mechanics of Schrodinger, or and equivalent, and
assign a c-number function in phase space to it. We propose to begin with a
higher level of abstraction, in which the independence and the symmetric role
of q and p is maintained throughout, and at once arrive at phase space state
functions. Upon reduction to the q- or p-space the proposed formalism gives the
conventional quantum mechanics, however, with a definite rule for ordering of
factors of non commuting observables. Further conceptual and practical merits
of the formalism are demonstrated throughout the text.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 15:27:16 GMT"
}
] | 2015-06-26T00:00:00 |
[
[
"Nasiri",
"S.",
""
],
[
"Sobouti",
"Y.",
""
],
[
"Taati",
"F.",
""
]
] |
quant-ph/0605130
|
Roderich Tumulka
|
Roderich Tumulka
|
Determinate Values for Quantum Observables
|
5 pages LaTeX, no figures
|
Brit. J. Phil. Sci. 58 (2007) 355-360
|
10.1093/bjps/axm003
| null |
quant-ph
| null |
This is a comment on J. A. Barrett's article ``The Preferred-Basis Problem
and the Quantum Mechanics of Everything'' in Brit. J. Phil. Sci. 56 (2005),
which concerns theories postulating that certain quantum observables have
determinate values, corresponding to additional (often called ``hidden'')
variables. I point out that it is far from clear, for most observables, what
such a postulate is supposed to mean, unless the postulated additional variable
is related to a clear ontology in space-time, such as particle world lines,
string world sheets, or fields.
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 18:22:22 GMT"
}
] | 2007-06-13T00:00:00 |
[
[
"Tumulka",
"Roderich",
""
]
] |
quant-ph/0605131
|
Avi Pe'er
|
Avi Pe'er
|
Comment on "Can Two-Photon Correlation of Chaotic Light be Considered as
Correlation of Intensity Fluctuations ?"
|
A 1 Page comment to Scarcelli et al., PRL 96, 063602 (2006).
Currently under review at PRL
| null | null | null |
quant-ph physics.optics
| null |
A Comment on the Letter by G. Scarcelli, V. Berardi and Y. Shih, Phys. Rev.
Lett. 96, 063602 (2006).
|
[
{
"version": "v1",
"created": "Mon, 15 May 2006 23:00:58 GMT"
}
] | 2011-11-22T00:00:00 |
[
[
"Pe'er",
"Avi",
""
]
] |
quant-ph/0605132
|
Kazuyuki Fujii
|
Kazuyuki Fujii (Yokohama City University)
|
A Generalization of the Preceding Paper ``A Rabi Oscillation in Four and
Five Level Systems"
|
Latex ; 10 pages ; 2 figures
| null | null | null |
quant-ph math-ph math.MP
| null |
In the preceding paper quant-ph/0312060 we considered a general model of an
atom with n energy levels interacting with n-1 external laser fields and
constructed a Rabi oscillation in the case of n =3, 4 and 5.
In the paper we present a systematic method getting along with computer to
construct a Rabi oscillation in the general case.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 01:16:28 GMT"
}
] | 2007-05-23T00:00:00 |
[
[
"Fujii",
"Kazuyuki",
"",
"Yokohama City University"
]
] |
quant-ph/0605133
|
Heng Fan
|
Heng Fan, Vladimir Korepin, Vwani Roychowdhury, Christopher Hadley,
and Sougato Bose
|
Boundary effects to the entanglement entropy and two-site entanglement
of the spin-1 valence-bond solid
|
4 pages, 2 figures. Physical Review B (in press)
|
Phys. Rev. B 76, 014428 (2007).
|
10.1103/PhysRevB.76.014428
| null |
quant-ph cond-mat.str-el
| null |
We investigate the von Neumann entropy of a block of subsystem for the
valence-bond solid (VBS) state with general open boundary conditions. We show
that the effect of the boundary on the von Neumann entropy decays exponentially
fast in the distance between the subsystem considered and the boundary sites.
Further, we show that as the size of the subsystem increases, its von Neumann
entropy exponentially approaches the summation of the von Neumann entropies of
the two ends, the exponent being related to the size. In contrast to critical
systems, where boundary effects to the von Neumann entropy decay slowly, the
boundary effects in a VBS, a non-critical system, decay very quickly. We also
study the entanglement between two spins.
Curiously, while the boundary operators decrease the von Neumann entropy of L
spins, they increase the entanglement between two spins.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 13:52:45 GMT"
},
{
"version": "v2",
"created": "Thu, 3 Aug 2006 07:31:58 GMT"
},
{
"version": "v3",
"created": "Mon, 23 Jul 2007 12:50:39 GMT"
}
] | 2009-09-29T00:00:00 |
[
[
"Fan",
"Heng",
""
],
[
"Korepin",
"Vladimir",
""
],
[
"Roychowdhury",
"Vwani",
""
],
[
"Hadley",
"Christopher",
""
],
[
"Bose",
"Sougato",
""
]
] |
quant-ph/0605134
|
Taksu Cheon
|
Taksu Cheon
|
Game Theory Formulated on Hilbert Space
|
in Proceedings of International Conference, "Quantum Information:
Back Action", Indian Institute of Technology, Kanpur, Kanpur India, march,
2006
| null |
10.1063/1.2400897
| null |
quant-ph
| null |
We present a consistent formulation of quantum game theory that accommodates
all possible strategies in Hilbert space. The physical content of the quantum
strategy is revealed as a family of classical games representing altruistic
game play supplemented by quantum interferences. Crucial role of the
entanglement in quantum strategy is illustrated by an example of quantum game
representing the Bell's experiment.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 02:59:11 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Cheon",
"Taksu",
""
]
] |
quant-ph/0605135
|
Ye Yeo
|
Ye Yeo, Chee Leong Ching, Jeremy Chong, Wee Kang Chua, Andreas
Dewanto, Zhi Han Lim
|
Detection of Gravitational Wave - An Application of Relativistic Quantum
Information Theory
|
9 pages
|
Europhys.Lett.78:20006,2007
|
10.1209/0295-5075/78/20006
| null |
quant-ph
| null |
We show that a passing gravitational wave may influence the spin entropy and
spin negativity of a system of $N$ massive spin-1/2 particles, in a way that is
characteristic of the radiation. We establish the specific conditions under
which this effect may be nonzero. The change in spin entropy and negativity,
however, is extremely small. Here, we propose and show that this effect may be
amplified through entanglement swapping. Relativistic quantum information
theory may have a contribution towards the detection of gravitational wave.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 06:10:14 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Yeo",
"Ye",
""
],
[
"Ching",
"Chee Leong",
""
],
[
"Chong",
"Jeremy",
""
],
[
"Chua",
"Wee Kang",
""
],
[
"Dewanto",
"Andreas",
""
],
[
"Lim",
"Zhi Han",
""
]
] |
quant-ph/0605136
|
Arthur Jabs
|
Arthur Jabs
|
A realist view on the treatment of identical particles
|
24 pages, Latex2e
| null | null | null |
quant-ph cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Some basic concepts concerning systems of identical particles are discussed
in the framework of a realist interpretation, where the wave function is the
quantum object and |psi(r)|^2 d^3r is the probability that the wave function
causes an effect about the point r. The topics discussed include the role of
Hilbert-space labels, wave-function variables and wave-function parameters, the
distinction between permutation and renaming, the reason for symmetrizing the
wave function, the reason for antisymmetric wave functions, the spin-statistics
theorem, the correction term -k lnN! in the entropy, the Boltzmann limit of the
Fermi and Bose cases, and the derivation of the Fermi and Bose distributions.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 06:19:23 GMT"
},
{
"version": "v2",
"created": "Wed, 15 Oct 2008 08:32:34 GMT"
},
{
"version": "v3",
"created": "Mon, 26 Apr 2010 07:30:37 GMT"
},
{
"version": "v4",
"created": "Thu, 1 Jul 2010 08:18:13 GMT"
},
{
"version": "v5",
"created": "Fri, 6 Feb 2015 08:51:12 GMT"
}
] | 2015-02-09T00:00:00 |
[
[
"Jabs",
"Arthur",
""
]
] |
quant-ph/0605137
|
Luis L. Sanchez. Soto
|
Z. Hradil, J. Rehacek, Z. Bouchal, R. Celechovsky and L. L.
Sanchez-Soto
|
Minimum uncertainty measurements of angle and angular momentum
|
4 pages, two eps color figures. Submitted for publication
|
Phys. Rev. Lett. 97, 243601 (2006)
|
10.1103/PhysRevLett.97.243601
| null |
quant-ph
| null |
The uncertainty relations for angle and angular momentum are revisited. We
use the exponential of the angle instead of the angle itself and adopt
dispersion as a natural measure of resolution. We find states that minimize the
uncertainty product under the constraint of a given uncertainty in angle or in
angular momentum. These states are described in terms of Mathieu wave functions
and may be approximated by a von Mises distribution, which is the closest
analogous of the Gaussian on the unit circle. We report experimental results
using beam optics that confirm our predictions.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 07:07:25 GMT"
}
] | 2008-07-25T00:00:00 |
[
[
"Hradil",
"Z.",
""
],
[
"Rehacek",
"J.",
""
],
[
"Bouchal",
"Z.",
""
],
[
"Celechovsky",
"R.",
""
],
[
"Sanchez-Soto",
"L. L.",
""
]
] |
quant-ph/0605138
|
Miguel Angel Martin-Delgado
|
H. Bombin, M.A. Martin-Delgado
|
Topological Quantum Distillation
|
RevTex4 file, 4 pages, 4 figures
|
Phys.Rev.Lett. 97 (2006) 180501
|
10.1103/PhysRevLett.97.180501
| null |
quant-ph cond-mat.str-el hep-th
| null |
We construct a class of topological quantum codes to perform quantum
entanglement distillation. These codes implement the whole Clifford group of
unitary operations in a fully topological manner and without selective
addressing of qubits. This allows us to extend their application also to
quantum teleportation, dense coding and computation with magic states.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 09:58:08 GMT"
},
{
"version": "v2",
"created": "Thu, 1 Jun 2006 11:03:00 GMT"
},
{
"version": "v3",
"created": "Thu, 29 Mar 2007 14:13:06 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Bombin",
"H.",
""
],
[
"Martin-Delgado",
"M. A.",
""
]
] |
quant-ph/0605139
|
J. G. Muga
|
A. del Campo, F. Delgado, G. Garcia-Calderon, J. G. Muga, and M. G.
Raizen
|
Decay by tunneling of Bosonic and Fermionic Tonks-Girardeau Gases
| null |
Phys. Rev. A 74, 013605 (2006)
|
10.1103/PhysRevA.74.013605
| null |
quant-ph cond-mat.soft
| null |
We study the tunneling dynamics of bosonic and fermionic Tonks-Girardeau
gases from a hard wall trap, in which one of the walls is substituted by a
delta potential. Using the Fermi-Bose map, the decay of the probability to
remain in the trap is studied as a function of both the number of particles and
the intensity of the end-cap delta laser. The fermionic gas is shown to be a
good candidate to study deviations of the non-exponential decay of the
single-particle type, whereas for the bosonic case a novel regime of
non-exponential decay appears due to the contributions of different resonances
of the trap.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 14:38:26 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"del Campo",
"A.",
""
],
[
"Delgado",
"F.",
""
],
[
"Garcia-Calderon",
"G.",
""
],
[
"Muga",
"J. G.",
""
],
[
"Raizen",
"M. G.",
""
]
] |
quant-ph/0605140
|
Michael Khasin
|
Michael Khasin and Ronnie Kosloff
|
The rise and fall of quantum and classical correlations in open-system
dynamics
|
35 pages, 10 figures. Revised according to comments of the referees.
Accepted for publication in Phys. Rev. A
|
Phys. Rev. A 76, 012304 (2007)
|
10.1103/PhysRevA.76.012304
| null |
quant-ph
| null |
Interacting quantum systems evolving from an uncorrelated composite initial
state generically develop quantum correlations -- entanglement. As a
consequence, a local description of interacting quantum system is impossible as
a rule. A unitarily evolving (isolated) quantum system generically develops
extensive entanglement: the magnitude of the generated entanglement will
increase without bounds with the effective Hilbert space dimension of the
system. It is conceivable, that coupling of the interacting subsystems to local
dephasing environments will restrict the generation of entanglement to such
extent, that the evolving composite system may be considered as approximately
disentangled. This conjecture is addressed in the context of some common models
of a bipartite system with linear and nonlinear interactions and local coupling
to dephasing environments. Analytical and numerical results obtained imply that
the conjecture is generally false. Open dynamics of the quantum correlations is
compared to the corresponding evolution of the classical correlations and a
qualitative difference is found.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 14:40:30 GMT"
},
{
"version": "v2",
"created": "Mon, 25 Dec 2006 16:47:49 GMT"
},
{
"version": "v3",
"created": "Tue, 8 May 2007 18:06:19 GMT"
}
] | 2009-11-13T00:00:00 |
[
[
"Khasin",
"Michael",
""
],
[
"Kosloff",
"Ronnie",
""
]
] |
quant-ph/0605141
|
Klaus Klingm\"uller
|
Holger Gies and Klaus Klingmuller (Heidelberg U.)
|
Worldline algorithms for Casimir configurations
|
23 pages, 9 figures
|
Phys.Rev.D74:045002,2006
|
10.1103/PhysRevD.74.045002
| null |
quant-ph cond-mat.stat-mech hep-th
| null |
We present improved worldline numerical algorithms for high-precision
calculations of Casimir interaction energies induced by scalar-field
fluctuations with Dirichlet boundary conditions for various Casimir geometries.
Significant reduction of numerical cost is gained by exploiting the symmetries
of the worldline ensemble in combination with those of the configurations. This
facilitates high-precision calculations on standard PCs or small clusters. We
illustrate our strategies using the experimentally most relevant sphere-plate
and cylinder-plate configuration. We compute Casimir curvature effects for a
wide parameter range, revealing the tight validity bounds of the commonly used
proximity force approximation (PFA). We conclude that data analysis of future
experiments aiming at a precision of 0.1% must no longer be based on the PFA.
Revisiting the parallel-plate configuration, we find a mapping between the
D-dimensional Casimir energy and properties of a random-chain polymer ensemble.
|
[
{
"version": "v1",
"created": "Tue, 16 May 2006 15:48:02 GMT"
}
] | 2008-11-26T00:00:00 |
[
[
"Gies",
"Holger",
"",
"Heidelberg U."
],
[
"Klingmuller",
"Klaus",
"",
"Heidelberg U."
]
] |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.