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Investigation of Higgs boson couplings via the production of a single top quark in association with a Higgs boson in the $\text{H} \to \text{b} \bar{\text{b}}$ channel | A search for the production of a single top quark in association with a Higgs boson is performed using the decay $\text{H} \to \text{b} \bar{\text{b}}$. The rate of this Higgs production mode is particularly sensitive to the relative sign of the Higgs boson couplings to fermions and bosons. The 2015 pp collisions data at a center-of-mass energy of 13 TeV are analyzed. This poster focuses on the discrimination between signal and background events. Upper limits, determined in the two-dimensional plane spanned by the coupling modifiers of the Higgs boson to top quarks and to vector bosons, are presented. | We introduce the Simulator for Quantum Networks and Channels ($\texttt{SQUANCH}$), an open-source Python library for creating parallelized simulations of distributed quantum information processing. The framework includes many features of a general-purpose quantum computing simulator, but it is optimized specifically for simulating quantum networks. It includes functionality to allow users to easily design complex multi-party quantum networks, extensible classes for modeling noisy quantum channels, and a multiprocessed NumPy backend for performant simulations. We present an overview of the structure of the library, describing how the various API elements represent the underlying physics and providing simple usage examples for each module. Finally, we present several demonstrations of canonical quantum information protocols implemented using this framework. | eng_Latn | 3,900 |
A decoupling network for two-element array using uniform coupled-line sections | A decoupling network for two-element closely-spaced arrays is investigated in this paper with rigorous design formulas. The proposed scheme deals with even-/odd-mode matching and decoupling requirements individually and can achieve overall excellent impedance matching and isolation at the same time. | We construct a class of entangled states in $\mathcal{H}=\mathcal{H}_{A}\otimes\mathcal{H}_{B}\otimes\mathcal{H}_{C}$ quantum systems with $dim\mathcal{H}_{A}=dim\mathcal{H}_{B}=dim\mathcal{H}_{C}=2$ and classify those states with respect to their distillability properties. The states are bound entanglement for the bipartite split$(AB)-C$. The states are NPT entanglement and $1$-copy undistillable for the bipartite splits $A-(BC)$ and $B-(AC)$. Moreover, we generalize the results of $2\otimes2\otimes2$ systems to the case of $2n\otimes 2n\otimes2n$ systems. | eng_Latn | 3,901 |
Verifying cross-Kerr induced number squeezing: a case study | AbstractWe analyse an experimental method for creating interesting nonclassical states by processing the entanglement generated when two large coherent states interact in a cross-Kerr medium. We specifically investigate the effects of loss and noise in every mode of the experiment, as well as the effect of ‘binning’ the post-selection outcomes. Even with these imperfections, we find an optimal set of currently achievable parameters which would allow a proof-of-principle demonstration of number squeezing in states with large mean photon number. We discuss other useful states which can be generated with the same experimental tools, including a class of states which contain coherent superpositions of differing photon numbers, e.g. good approximations to the state 12(|0⟩+|20⟩). Finally, we suggest one possible application of this state in the field of optomechanics. | Given a pair of simple dimension groups with isomorphic state spaces we try to express it as the pair K0(A),K0(A×αR) of K0 groups for a C*-algebra A with an action α of R, where both A and the crossed product A×αR are supposed to be simple AT algebras of real rank zero. We solve this when the state spaces are finite-dimensional. | eng_Latn | 3,902 |
Duality in Markov Decision Problems with Countable Action and State Spaces | The recent literature contains several papers which explore mathematical programming formulations of particular Markov sequential decision problems. Each of these papers deals with finite state and action spaces; thus, the corresponding programming formulations yield dual finite linear programs. In this paper these investigations are extended to include countable action and/or state spaces for finite horison problems. Of particular interest are the duality aspects of the mathematical programming formulations. In addition, employing conditions analogous to fundamental concepts of Haar semi-infinite dual programming, we provide sufficient conditions for the existence of optimal rules for countable action spaces. Guided by the semi-infinite duality theory we explore mathematical programming formulations for two cases: 1) Countable action space and finite state space—the result is a pair of dual semi-infinite programs; and 2) Finite action space and countable state space—we obtain a pair of infinite programs.... | Quantum Hall edge channels at integer filling factor provide a unique test-bench to understand decoherence and relaxation of single electronic excitations in a ballistic quantum conductor. In this Letter, we obtain a full visualization of the decoherence scenario of energy (Landau) and time (Levitov) resolved single electron excitations at filling factor $\nu=2$. We show that the Landau excitation exhibits a fast relaxation followed by spin-charge separation whereas the Levitov excitation only experiences spin-charge separation. We finally suggest to use Hong-Ou-Mandel type experiments to probe specific signatures of these different scenarios. | eng_Latn | 3,903 |
Generating Entangled Photons from the Vacuum by Accelerated Measurements: Quantum Information Theory Meets the Unruh-Davies Effect | quantum communications between accelerated and stationary observers. We find that the projective measurement by a uniformly accelerated observer can excite real particles from the vacuum in the inertial frame, even if no additional particles are created by the measurement process in the accelerating frame. Furthermore, we show that the particles created by this accelerating measurement can be highly entangled in the inertial frame, and it is also possible to use this process to generate even maximally entangled two-qubit states by a certain arrangement of measurements. As a by-product of our analysis, we also show that a single qubit of information can be perfectly transmitted from the accelerating observer to the inertial one. In principle, such an effect could be exploited in designing an entangled-state generator for quantum communication. | Abstract In this paper, we study the long-time behavior of solutions for a non-autonomous strongly damped wave equation. We first prove the existence of a uniform attractor for the equation with a translation compact driving force and then obtain an upper estimate for the Kolmogorov e -entropy of the uniform attractor. Finally we obtain an upper bound of the fractal dimension of the uniform attractor with quasiperiodic force. | eng_Latn | 3,904 |
On a group of 1440 birational transformations of four variables that arises in considering the projective equivalence of double sixes | The lines of a double-six will here be represented by the usual notation where two lines whose symbols are in the same line or same column of this scheme are non-intersectors and all other pairs of lines intersect. Any six of the lines, no two of whose symbols are in the same column, and just three are in the same row, are generators of a quadric, and the actual position in space of each of the other six is determined by the two points in which it intersects this quadric. | Abstract How well can we manipulate the state of a particle via a discrete-time quantum walk? We show that the discrete-time quantum walk on a one-dimensional infinite chain with coin operators that are independent of the position can only realize product operators of the form e i ξ A ⊗ 1 p , which cannot change the position state of the walker. We present a scheme to construct all possible realizations of all the product operators of the form e i ξ A ⊗ 1 p . When the coin operators are dependent on the position, we show that the translation operators on the position can not be realized via a DTQW with coin operators that are either the identity operator 1 or the Pauli operator σ x . | eng_Latn | 3,905 |
Theory of Machines and Mechanisms in the Electronic Era | The widely held notion ‘that most machine problems can be solved by active control’ and Machines and Mechanisms Theory can be dropped from mechanical engineering curricula is discussed and refuted, and the role of electronics and computers in machine engineering are put in their correct context. Computer-aided control of machines and mechanisms cannot replace the mechanical essence of the mechanical end-actuator, tool, etc. An in-depth knowledge of the theory of mechanisms is essential for the understanding and development of new approaches to machine design as well as for computer programming relevant to this field. | Abstract The interaction between two harmonic oscillators, a classical and a quantum one, coupled through a linear term, is analyzed by recourse to Ehrenfest's theorem. This model is able to mimic dissipative behaviour for the quantum harmonic oscillator, without violating any quantum rule. | eng_Latn | 3,906 |
Quantum robot: structure, algorithms and applications | A brand-new paradigm of robots–quantum robots–is proposed through the fusion of quantum theory with robot technology. A quantum robot is essentially a complex quantum system which generally consists of three fundamental components: multi-quantum computing units (MQCU), quantum controller/actuator, and information acquisition units. Corresponding to the system structure, several learning control algorithms, including quantum searching algorithms and quantum reinforcement learning algorithms, are presented for quantum robots. The theoretical results show that quantum robots using quantum searching algorithms can reduce the complexity of the search problem from O($N^2)$ in classical robots to O($N\sqrt N)$. Simulation results demonstrate that quantum robots are also superior to classical robots in efficient learning under novel quantum reinforcement learning algorithms. Considering the advantages of quantum robots, some important potential applications are also analyzed and prospected. | The dependence of the differential cross section ${\mathrm{d}\sigma}/{\mathrm{d}p_{\perp}}$ of inclusive heavy quark production in pp and $\bar{\mathrm{p}}$p collisions on the renormalization and factorization scales is investigated. The implications of our results for experiments at TEVATRON and LHC are discussed. In particular, it is shown that the NLO QCD predictions for $\bar{t}t$ production at the LHC based on the Principle of Minimal Sensitivity are by 30-50% higher than the standard ones. | eng_Latn | 3,907 |
Of science and scientists in QTP | Aspects of the science and the ways of doing science characteristic of the two senior scientists of Quantum Theory Project (QTP) in the period 1969–1985 are discussed from the perspective of the only QTP faculty member of that era who did not grow up in either the Lowdin or Slater schools. | BE PART OF IT: Together we can inspire the imagination of our youth and secure Australia's future. We invite you to be involved in our community at the Cube QUT. | eng_Latn | 3,908 |
On the Complexity of Quantum Languages | The standard inputs given to a quantum machine are classical binary strings. In this view, any quantum complexity class is a collection of subsets of {0, 1} � . However, a quantum machine can also accept quantum states as its input. T. Yamakami has introduced a general framework for quantum operators and inputs [18]. In this paper we present several quantum languages within this model and by generalizing the complexity classes QMA and QCMA we analyze the complexity of the introduced languages. We also discuss how to derive a classical language from a given quantum language and as a result we introduce new QCMA and QMAlanguages. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,909 |
Meta-genetic programming for static quantum circuits | Quantum programs are difficult for humans to develop due to their complex semantics that are rooted in quantum physics. It is therefore preferable to write specifications and then use techniques such as genetic programming (GP) to generate quantum programs instead. We present a new genetic programming system for quantum circuits which can evolve solutions to the full-adder and quantum Fourier transform problems in fewer generations than previous work, despite using a general set of gates. This means that it is no longer required to have any previous knowledge of the solution and choose a specialised gate set based on it. | This paper is concerned with a discrete-time mean-field stochastic linear-quadratic optimal control problem arising from financial application. Through matrix dynamical optimisation method, a group... | eng_Latn | 3,910 |
We analyzed localized charge time evolution in the system of two interacting quantum dots (QD) (artificial molecule) coupled with the continuous spectrum states. We demonstrated that Coulomb interaction modifies relaxation rates and is responsible for non-monotonic time evolution of the localized charge. We suggested new mechanism of this non-monotonic charge time evolution connected with charge redistribution between different relaxation channels in each QD. | We have analyzed theoretically quenched dynamics of correlated double quantum dot (DQD) due to the switching “on” and “off” coupling to reservoirs. The possibility for controllable manipulation of charge and spin states in the double quantum dot was revealed and discussed. The proposed experimental scheme allows to prepare in DQD maximally entangled pure triplet state and to drive it to another entangled singlet state by tuning both applied bias and gate voltage. It was also demonstrated that the symmetry properties of the total system (double quantum dot coupled to electron reservoirs) allow to resolve the initially prepared two-electron states by detecting non-stationary spin-polarized currents flowing in both reservoirs and controlling the residual charge. | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 3,911 |
Design of delta-sigma feedback loop for quantum voltage digitizer | A system utilizing a delta-sigma (DS) feedback loop to digitize an arbitrary voltage waveform in terms of the quantum-accurate output of a Josephson junction array (JJA) has been designed. Using commercially available components, a first order DS loop has been constructed and tested with direct feedback. At a sample rate of 20 MHz a signal to noise ratio of < 104 was demonstrated. | A purely deterministic approach to the LMS (least mean square)-Newton algorithm for adaptive filters is proposed. A QR-decomposition method for solving the algorithm's equations is described. Simulations using fixed-point arithmetic are provided, which confirm the good numerical characteristics of the method. A variable convergence factor is also discussed which is optimum in the sense that the output a posteriori error is zero. > | eng_Latn | 3,912 |
Xylitol treats nasal mucosa in rhinitis medicamentosa: an experimental rat model study | Objective ::: Rhinitis medicamentosa is drug-induced rhinitis which occurs by prolonged and overdose usage of topical nasal decongestants. There is not much of treatment choice rather than nasal steroids. In this pathological study, we have been aimed to represent the healing effects of xylitol on damaged nasal mucosa due to rhinitis medicamentosa. | We investigate the influence of electrical charge noise on a resonant exchange (RX) qubit in a triple quantum dot. This RX qubit is a variation of the exchange-only spin qubit which responds to a narrow-band resonant frequency. Our noise model includes uncorrelated charge noise in each quantum dot giving rise to two independent (noisy) bias parameters $\varepsilon$ and $\Delta$. We calculate the energy splitting of the two qubit states as a function of these two bias detuning parameters to find"sweet spots", where the qubit is least susceptible to noise. Our investigation shows that such sweet spots exist within the low bias regime, in which the bias detuning parameters have the same magnitude as the hopping parameters. The location of the sweet spots in the $(\varepsilon,\Delta)$ plane depends on the hopping strength and asymmetry between the quantum dots. In the regime of weak charge noise, we identify a new favorable operating regime for the RX qubit based on these sweet spots. | eng_Latn | 3,913 |
Algorithms for Quantum Computers | Quantum amplitude amplifica-tion and estimation | Constipation as a Feature of Anogenital Lichen Sclerosus in Children | eng_Latn | 3,914 |
An integrated two-qubit quantum network node | We build a two-qubit quantum network node based on a 13C nuclear spin and a silicon-vacancy center strongly coupled to a diamond nanophotonic cavity and efficiently interfaced with a tapered optical fiber. | A new approach of speech de-noising is put forward--second-decomposition wavelet global threshold.This ap-proach is different from the traditional methods.First,it decomposes high frequency twice,and then de-noises the signal by threshold de-noising.Simulated test is made on MATLAB.Test results show that the algorithm improved upon signal to noise ratio,and wiped off the most noise with full effective energy.At the same time,the interference problem of noise signal is absolutely solved. | eng_Latn | 3,915 |
Study of a quantum CNOT logic gate with electron spins of diamond impurities | Abstract Quantum computing requires a set of universal quantum gates. The standard set includes single quantum bit (qubit) gates and the controlled-NOT (CNOT) which is the analog of the classical XOR gate. It flips the state of the target qubit conditioned on the state of the control qubit. We investigated the possibility of implementing a CNOT logic gate using magnetically coupled impurity spins of diamond, namely the electron spin-1 carried by the nitrogen-vacancy color center and the electron spin- 1 2 carried by a nearby nitrogen atom in substitutional position (P1 center). It is shown that a 96 ns gate time with a high-fidelity can be realized by means of pulsed electron spin resonance spectroscopy. | A general expression is constructed for the weak hadronic current in the colored-quark model with SU (3) x SU (3) ' symmetry. It is shown that there exist several different solutions for which it is possible to suppress neutral currents with changing strangeness. An additional peculiarity of the model is the presence of ..delta..Q=2 transitions which also result in diagonal neutral currents. | eng_Latn | 3,916 |
Quantum sensing with arbitrary frequency resolution | Quantum sensing takes advantage of well-controlled quantum systems for performing measurements with high sensitivity and precision. We have implemented a concept for quantum sensing with arbitrary frequency resolution, independent of the qubit probe and limited only by the stability of an external synchronization clock. Our concept makes use of quantum lock-in detection to continuously probe a signal of interest. Using the electronic spin of a single nitrogen-vacancy center in diamond, we demonstrate detection of oscillating magnetic fields with a frequency resolution of 70 microhertz over a megahertz bandwidth. The continuous sampling further guarantees an enhanced sensitivity, reaching a signal-to-noise ratio in excess of 104 for a 170-nanotesla test signal measured during a 1-hour interval. Our technique has applications in magnetic resonance spectroscopy, quantum simulation, and sensitive signal detection. | ABSTRACTThis paper aims to develop, assess, and numerically implement analytical models for the newly introduced Quintuple Friction Pendulum Isolator (QFPI) which can identically capture its real e... | eng_Latn | 3,917 |
Three-dimensional imaging with a terahertz quantum cascade laser. | Results are presented for the first imaging system that combines the high power of terahertz quantum cascade lasers with three-dimensional image reconstruction based on filtered back-projection. Images of various phantoms have been successfully reconstructed revealing both their external and internal structures. | In this paper, we examine a variety of strategies for numerical quantum-state estimation from data of the sort commonly measured in experiments involving quantum state tomography. We find that, in some important circumstances, an elaborate and time-consuming numerical optimization to obtain 'the best' density matrix corresponding to a given data set is not necessary, and that cruder, faster numerical techniques may well be 'good enough'. | eng_Latn | 3,918 |
NPY2 receptor activation in the dorsal vagal complex increases food intake and attenuates CCK-induced satiation in male rats. | Neuropeptide Y (NPY), peptide YY (PYY), and their cognate receptors (YR) are expressed by subpopulations of central and peripheral nervous system neurons. Intracerebroventricular injections of NPY ... | We investigate the influence of electrical charge noise on a resonant exchange (RX) qubit in a triple quantum dot. This RX qubit is a variation of the exchange-only spin qubit which responds to a narrow-band resonant frequency. Our noise model includes uncorrelated charge noise in each quantum dot giving rise to two independent (noisy) bias parameters $\varepsilon$ and $\Delta$. We calculate the energy splitting of the two qubit states as a function of these two bias detuning parameters to find"sweet spots", where the qubit is least susceptible to noise. Our investigation shows that such sweet spots exist within the low bias regime, in which the bias detuning parameters have the same magnitude as the hopping parameters. The location of the sweet spots in the $(\varepsilon,\Delta)$ plane depends on the hopping strength and asymmetry between the quantum dots. In the regime of weak charge noise, we identify a new favorable operating regime for the RX qubit based on these sweet spots. | eng_Latn | 3,919 |
Large Scale Quantum Simulations Using Tight-Binding Hamiltonians and Linear Scaling Methods | We describe linear scaling methods for electronic structure calculations and quantum molecular dynamics simulations which are based on an orbital formulation of the electronic problem. In particular, we discuss some open problems which need to be addressed to improve the performance of these methods, and briefly review some applications to carbon and silicon systems, with a Tight-Binding framework. | We analyze the dynamics of a qubit-resonator system coupled with a thermal bath and external electromagnetic fields. Using the evolution equations for the set of Heisenberg operators that describe the whole system, we derive an expression for the resonator field, accounting for the resonator-drive, -bath, and -qubit interaction. The renormalization of the resonator frequency caused by the qubit-resonator interaction is accounted for. Using solutions for the resonator field, we derive the equation describing qubit dynamics. The influence of the qubit evolution during measurement time on the fidelity of a single-shot measurement is studied. The relation between fidelity and measurement time is shown explicitly. Also, an expression describing relaxation of the superposition qubit state toward its stationary value is derived. The possibility of controlling this state by varying the amplitude and frequency of drive is shown. | eng_Latn | 3,920 |
Continious Variable (CV) Entanglement Formulation for Bipartite Quantum System | We analyze density operator, Q function, photon statistics, quadrature squeezing, and Cv entanglement that holds true for a pair of superposed two-mode photon system. We also present a slightly modified definition of entanglement and squeezing for a pair of super- posed two-mode system and new definition for degree of entanglement. In order to carry out our analysis, we consider a quantum system with Gaussian variables with zero mean. It is found that maximum degree of entanglement as well as squeezing occurs at steady-state and threshold. | We consider the cross area of the PP_ and PSV_wave window as the best window for joint PP_ and PSV_wave acquisition in VTI media. Within the effective window, the PP_ and PSV_wave's raypathes and phase angles at all reflection points are calculated, and the reflection (or transmission) coefficients' ratios of PSV- to PP_wave solved from Zoeppritz equations are defined as the controlling factor G. Then we use G values as the main controlling parameters of joint PP_ and PSV_wave acquisition design in VTI media, determine the best receiving window of detectors by analyzing G values, and derive the method of optimizing the receiving window for acquisition of multi_component converted seismic data in VTI media. | eng_Latn | 3,921 |
Shot noise properties of electron transport through an interacting multi-terminal quantum dots system. | We study the correlations of tunneling currents through an interacting quantum dots (QDs) system composed of a top single QD and a bottom qubit with purely capacitive coupling within a quantum master approach. We find that the super-Poissonian current noise of the qubit near resonance, which is a signature of coherent tunneling within the transport qubit for asymmetrical contact couplings, is strongly dependent on non-equilibrium transport through the top QD with different coupling configurations. For pure-dephasing coupling, such a super-Poissonian feature is asymmetrically washed out by increasing coupling strength showing obvious qubit level position dependence with finite bias and temperature, while for orthogonal coupling we can almost symmetrically lower the double peak to a double minimum by increasing coupling strength or adjusting the ratio of the top QD contact couplings in the large bias limit, indicating the transition from coherent tunneling to sequential tunneling. | We have acquired in vivo photoacoustic images of gastrointestinal tracts in rats using recently developed clinical photoacoustic/ultrasound imaging system. The result can be used to investigate motility of gastrointestinal tracts in clinical studies. | eng_Latn | 3,922 |
Fault-tolerant linear optical quantum computing with small-amplitude coherent states | Quantum computing using two optical coherent states as qubit basis states has been suggested as an interesting alternative to single photon optical quantum computing with lower physical resource overheads. These proposals have been questioned as a practical way of performing quantum computing in the short term due to the requirement of generating fragile diagonal states with large coherent amplitudes. Here we show that by using a fault-tolerant error correction scheme, one need only use relatively small coherent state amplitudes ($\alpha>1.2$) to achieve universal quantum computing. We study the effects of small coherent state amplitude and photon loss on fault tolerance within the error correction scheme using a Monte Carlo simulation and show the quantity of resources used for the first level of encoding is orders of magnitude lower than the best known single photon scheme. %We study this reigem using a Monte Carlo simulation and incorporate %the effects of photon loss in this simulation. | Summary form only given, as follows. A study is presented of precision constraints imposed by a hybrid chip architecture with analog neurons and digital backpropagation calculations. Conversions between the analog and digital domains and weight storage restrictions impose precision limits on both analog and digital calculations. It is shown through simulations that a learning system of this nature can be implemented in spite of limited resolution in the analog circuits and using fixed-point arithmetic to implement the backpropagation algorithm. > | eng_Latn | 3,923 |
Complete polarized photons Bell-states and Greenberger–Horne–Zeilinger-states analysis assisted by atoms | We propose an efficient protocol for complete polarized photons Bell-states and Greenberger–Horne–Zeilinger (GHZ)-states analysis assisted by atoms. With the help of assistant atoms and some simple liner optical elements, the analysis of both polarization Bell states and GHZ states can be performed completely. In our protocol, the assistant atoms are trapped in cavity quantum electronic dynamics (QED), which is feasible with current experimental technology. Moreover, the polarized photons entangled states will not be destroyed in our protocol. Therefore, our scheme might contribute to the quantum communication, quantum computation, and some other fields in quantum information processing. | We consider the cross area of the PP_ and PSV_wave window as the best window for joint PP_ and PSV_wave acquisition in VTI media. Within the effective window, the PP_ and PSV_wave's raypathes and phase angles at all reflection points are calculated, and the reflection (or transmission) coefficients' ratios of PSV- to PP_wave solved from Zoeppritz equations are defined as the controlling factor G. Then we use G values as the main controlling parameters of joint PP_ and PSV_wave acquisition design in VTI media, determine the best receiving window of detectors by analyzing G values, and derive the method of optimizing the receiving window for acquisition of multi_component converted seismic data in VTI media. | eng_Latn | 3,924 |
Almost periodic solutions for shunting inhibitory cellular neural networks with time-varying delays ✩ | In this paper the shunting inhibitory cellular neural networks (SICNNs) with time-varying delays are considered. Without assuming the global Lipschitz and bounded conditions of activation functions, sufficient conditions for the existence of the almost periodic solutions are established by using a fixed point theorem. The results of this paper are new and complement previously known results. | Interferometric precision with N uncorrelated particles is bounded by the standard quantum limit (SQL). We report deterministic generations of entangled atomic states as well as their sensing precisions more than 8dB beyond the SQL. | eng_Latn | 3,925 |
Entanglement for Two Dissipative Qubits | Entanglement dynamics of two qubits from environmental perturbations with different initial conditions is investigated. The results show that the qubit-qubit interaction leads to a periodic disentanglement and entanglement. It is surprised that the sudden death of entanglement (ESD) does not happen for non-interacting qubits, but for both the cases of a pure dephasing environment and a normal environment, ESD emerges. The results may provide a useful clue to implement an entanglement quantum information. | We investigate the emission dynamics of a single semiconductor quantum dot near a single Au nanoparticle. Due to coupling between the nanoparticles, the quantum dot exhibits a strong polarization dependence and reduced blinking. | eng_Latn | 3,926 |
Quantum Dot Spintronics: Fundamentals and Applications | Spintronics is a generalization of electronics: Electronics means charge carrier transport, spintronics adds to this transport the supplementary degree of freedom spin which has been neglected since the roots of electronics. In this sense, spintronics is opening a new dimension of functional devices which is even more mighty than it may look at a first glance: The electron spin and its orientation is a pure quantum mechanical phenomenon which leads in its complexity to much more information coding depth and combinatorial operations than the storage and transport of charges in classical electronics. That is why the quantum bit (qubit) concept has been introduced by Schumacher [1]. | In this paper, we consider the second order wave equation discretized in space by summation-by-parts-simultaneous approximation term (SBP-SAT) technique. Special emphasis is placed on the accuracy analysis of the treatment of the Dirichlet boundary condition and of the grid interface condition. The result shows that a boundary or grid interface closure with truncation error $\mathcal{O}(h^p)$ converges of order $p + 2$ if the penalty parameters are chosen carefully. We show that stability does not automatically yield a gain of two orders in convergence rate. The accuracy analysis is verified by numerical experiments. | eng_Latn | 3,927 |
Where Do Features Come From | phase relationship between hippocampal place units and the eeg theta rhythm . | Optimizing quantum optimization algorithms via faster quantum gradient computation | eng_Latn | 3,928 |
A cooperative Q-learning approach for distributed resource allocation in multi-user femtocell networks | Cognition and Docition in OFDMA-Based Femtocell Networks | FTQLS: Fault-Tolerant Quantum Logic Synthesis | eng_Latn | 3,929 |
Ef fi ciently measuring a quantum device using machine learning | Globally and locally consistent image completion | A Controllable Local Peak-Shaving Strategy for Effective Utilization of PEV Battery Capacity for Distribution Network Support | eng_Latn | 3,930 |
Comparison of LQR and PD controller for stabilizing Double Inverted Pendulum System | Fuzzy logic controller for an inverted pendulum system using quantum genetic optimization | The Down syndrome-related protein kinase DYRK1A phosphorylates p27Kip1 and Cyclin D1 and induces cell cycle exit and neuronal differentiation | eng_Latn | 3,931 |
A new theory of the origin of cancer: quantum coherent entanglement, centrioles, mitosis, and differentiation | Quantum computation in brain microtubules: Decoherence and biological feasibility | Stratification of ovarian tumor pathology by expression of programmed cell death-1 (PD-1) and PD-ligand- 1 (PD-L1) in ovarian cancer | eng_Latn | 3,932 |
ROI analysis for remote photoplethysmography on facial video | Non-contact, automated cardiac pulse measurements using video imaging and blind source separation | Parallelising matrix operations on clusters for an optimal control-based quantum compiler | eng_Latn | 3,933 |
THE DOWNTIME DISTRIBUTION AFTER A FAILURE OF A SYSTEM WITH MULTISTATE INDEPENDENT COMPONENTS | Aven and Jensen (1999) proposed an approximation to the downtime distribution for arbitrary coherent systems with binary and independent repairable components, where each component follows an alternating renewal process. The approximation is based on a mixture of the duration distributions of the cut sets in the system. We extend this approach to coherent systems composed by multistate independent components, where every component follows a semi-Markov process and where we introduce the concept of a minimal cut set in the multistate setting. We test our proposal on a simple power demand-generation system, by comparing the analytic approximation with simulation results, and we find it is accurate when the system is highly available. | We construct a class of entangled states in $\mathcal{H}=\mathcal{H}_{A}\otimes\mathcal{H}_{B}\otimes\mathcal{H}_{C}$ quantum systems with $dim\mathcal{H}_{A}=dim\mathcal{H}_{B}=dim\mathcal{H}_{C}=2$ and classify those states with respect to their distillability properties. The states are bound entanglement for the bipartite split$(AB)-C$. The states are NPT entanglement and $1$-copy undistillable for the bipartite splits $A-(BC)$ and $B-(AC)$. Moreover, we generalize the results of $2\otimes2\otimes2$ systems to the case of $2n\otimes 2n\otimes2n$ systems. | yue_Hant | 3,934 |
Optimal encoding and decoding of a spin direction | For a system of N spins there are quantum states that can encode a direction in an intrinsic way. Information on this direction can later be decoded by means of a quantum measurement. We present here the optimal encoding and decoding procedure using the fidelity as a figure of merit. We compute the maximal fidelity and prove that it is directly related to the largest zeros of the Legendre and Jacobi polynomials. We show that this maximal fidelity approaches unity quadratically in $1/N.$ We also discuss this result in terms of the dimension of the encoding Hilbert space. | This paper studies the worst-case secrecy rate maximization problem under the total transmit power, the energy harvesting and the outage probability requirements. The problem is nonconvex, thus, hard to solve. Exploiting the special structure of the problem, we first reformulate as a DC (Difference of Convex functions) program. Then, we develop an efficient approach based on DCA (DC Algorithm) and alternating method for solving the problem. The computational results confirm the efficiency of the proposed approach. | eng_Latn | 3,935 |
Proposal for a new reading of a line in the Tuńuquq inscription | This paper is written in order to reread the sequence of signs 〈ẄzcI〉 and 〈TSN〉 occurring in the sentence 〈ẄzcI : TSN : TWTmstgbIz〉, in the 13th line of the Tunuquq Inscription. It is proposed that... | Abstract How well can we manipulate the state of a particle via a discrete-time quantum walk? We show that the discrete-time quantum walk on a one-dimensional infinite chain with coin operators that are independent of the position can only realize product operators of the form e i ξ A ⊗ 1 p , which cannot change the position state of the walker. We present a scheme to construct all possible realizations of all the product operators of the form e i ξ A ⊗ 1 p . When the coin operators are dependent on the position, we show that the translation operators on the position can not be realized via a DTQW with coin operators that are either the identity operator 1 or the Pauli operator σ x . | eng_Latn | 3,936 |
Redrawing Boundaries Around the Self: The Case of Self-Quantifying Technologies | Drawing on a 4-year ethnographic analysis of the ‘Quantified Self’, Dudhwala explores how personal medical devices (PMDs) in the form of self-quantifying technologies seem to be facilitating a new boundary around that which we would traditionally call the ‘self’ or the ‘body’. Dudhwala argues, using the sensibilities of science and technology studies, that rather than self-quantifying technologies reflecting a stable self, or body, already ‘out there’ waiting to be depicted through the data they produce, the self-quantifying technologies are an inextricable part of the multiple enactments of the self and the body and thus cannot be separated from the practices of using them. | We construct a class of entangled states in $\mathcal{H}=\mathcal{H}_{A}\otimes\mathcal{H}_{B}\otimes\mathcal{H}_{C}$ quantum systems with $dim\mathcal{H}_{A}=dim\mathcal{H}_{B}=dim\mathcal{H}_{C}=2$ and classify those states with respect to their distillability properties. The states are bound entanglement for the bipartite split$(AB)-C$. The states are NPT entanglement and $1$-copy undistillable for the bipartite splits $A-(BC)$ and $B-(AC)$. Moreover, we generalize the results of $2\otimes2\otimes2$ systems to the case of $2n\otimes 2n\otimes2n$ systems. | eng_Latn | 3,937 |
INEQUIVALENT QUANTIZATIONS OF GAUGE THEORIES | It is known that the quantization of a system defined on a topologically nontrivial configuration space is ambiguous in that many inequivalent quantum systems are possible. This is the case for multiply connected spaces as well as for coset spaces. Recently, a new framework for these inequivalent quantizations approach has been proposed by McMullan and Tsutsui, which is based on a generalized Dirac approach. We employ this framework to the quantization of the Yang–Mills theory in the simplest fashion. The resulting inequivalent quantum systems are labelled by quantized nondynamical topological charges. | This paper considers entry into a market with two incumbents where one prefers and one dislikes entry. Unlike the entrant both incumbents know market demand. One would like to signal high demand, the other low. In separating equilibria incumbents choose full information Nash-equilibrium strategies in each state. Such equilibria only exists if entry is relatively unimportant for an incumbent compared with the cost of deviating to the other state’s Nash-strategy. In growing markets this condition will tend to be violated, and only pooling equilibria may exist. Sensible pooling equilibria have one incumbent distorting price upwards, the other downwards. | yue_Hant | 3,938 |
Property optimization of BST-based composite glass ceramics for energy-storage applications | In this search, the nanocomposite of the rutile nano TiO2 and alkali-free glass (CaO–MgO–Al2O3–SiO2) were successfully produced by the method of sol–gel, which were sintered at 1200 °C for 2 h. The dielectric properties of the composites were studied. The permittivity of the composite with 15 % alkali-free glass addition is 114, while the breakdown voltage is 52.2 kV/mm and the energy density reaches 1.08 J/cm3 with low loss (<0.01), which is 1.4 times higher than that of pure TiO2 (0.76 J/cm3). | Recently, a large number of protocols for bidirectional controlled state teleportation (BCST) have been proposed using n-qubit entangled states ($$n\in \{5,6,7\}$$n?{5,6,7}) as quantum channel. Here, we propose a general method of selecting multiqubit $$(n>4)$$(n>4) quantum channels suitable for BCST and show that all the channels used in the existing protocols of BCST can be obtained using the proposed method. Further, it is shown that the quantum channels used in the existing protocols of BCST form only a negligibly small subset of the set of all the quantum channels that can be constructed using the proposed method to implement BCST. It is also noted that all these quantum channels are also suitable for controlled bidirectional remote state preparation. Following the same logic, methods for selecting quantum channels for other controlled quantum communication tasks, such as controlled bidirectional joint remote state preparation and controlled quantum dialogue, are also provided. | eng_Latn | 3,939 |
Simultaneously determining the frequency sum and time difference of two photons through sum frequency generation | We propose, analyze and evaluate a technique for the joint measurement of time-frequency entanglement between two photons. In particular, we show that the frequency sum and time difference of two photons could be simultaneously measured through the sum-frequency generation process, without measuring the time or frequency of each individual photon. We demonstrate the usefulness of this technique by using it to design a time-frequency entanglement based continuous variable superdense coding and a quantum illumination protocol. Performance analysis of these two protocols suggests that the joint measurement of strong time-frequency entanglement of non-classical photon pairs can significantly enhance the performance of joint-measurement based quantum communication and metrology protocols. | We propose an approach to synchronize the videos recorded by consumer level cameras, using feature points which extracted from markerless human motion video sequences. In this paper, we extend the work on computing rank constraints of videos, to find the temporal offset between two video sequences and achieve the goal of video synchronization. Our method uses the feature points' information to compose fundamental matrices, and then compute the singular values of matrices and finally find out the temporal offset we need. | eng_Latn | 3,940 |
High-performance source of spectrally pure, polarization entangled photon pairs based on hybrid integrated-bulk optics | Entangled photon pair sources based on bulk optics are approaching optimal design and implementation, with high state fidelities, spectral purities and heralding efficiencies, but generally low brightness. Integrated entanglement sources, while providing higher brightness and low-power operation, often sacrifice performance in output state quality and coupling efficiency. Here we present a polarization-entangled pair source based on a hybrid approach of waveguiding and bulk optics, addressing every metric simultaneously. We show 96% fidelity to the singlet state, 82% Hong-Ou-Mandel interference visibility, 43% average Klyshko efficiency, and a high brightness of $2.9\times10^6$ pairs/(mode$\cdot$s$\cdot$mW), while requiring only microwatts of pump power. | Abstract Structural-functional organization of natural biological systems is founded on the principle of evolutionary accumulation of information and division into separate hierarchical levels. Every hierarchical level has its own basic processes with a specific time-dynamic quantization scheme. The relative information entropy representing quantization schemes forms a widely known sequence of generalized divine section numbers. The product of photosynthesis basic processes is free energy shunted off into various energy-transferring compounds. The product of other basic processes is the matter also distributed between compounds of the product. Such an energy-matter distribution shows the same divine values of relative information entropy as the quantization scheme. | eng_Latn | 3,941 |
Information capacity of quantum observable | In this paper we consider the classical capacities of quantum-classical channels corresponding to measurement of observables. Special attention is paid to the case of continuous observables. We give the formulas for unassisted and entanglement-assisted classical capacities $C,C_{ea}$ and consider some explicitly solvable cases which give simple examples of entanglement-breaking channels with $C<C_{ea}.$ We also elaborate on the ensemble-observable duality to show that $C_{ea}$ for the measurement channel is related to the $\chi$-quantity for the dual ensemble in the same way as $C$ is related to the accessible information. This provides both accessible information and the $\chi$-quantity for the quantum ensembles dual to our examples. | We consider finite-horizon LQR control with limited controller-system communication. Within a time-horizon T , the controller can only communicate with the system d <; T times. We present an explicit expression on the optimal control data schedule for unstable first-order systems and a class of higher-order systems. We also discuss when such a control data schedule remains optimal (or is near optimal) for general systems. | eng_Latn | 3,942 |
Hoare Logic for Quantum Programs | Hoare logic is a foundation of axiomatic semantics of classical programs and it provides effective proof techniques for reasoning about correctness of classical programs. To offer similar techniques for quantum program verification and to build a logical foundation of programming methodology for quantum computers, we develop a full-fledged Hoare logic for both partial and total correctness of quantum programs. It is proved that this logic is (relatively) complete by exploiting the power of weakest preconditions and weakest liberal preconditions for quantum programs. | We find the greatest value 𝑝 and the least value 𝑞 in (0,1/2) such that the double inequality 𝐻(𝑝𝑎 | yue_Hant | 3,943 |
Proposal for a quantum Hall pump | A device is proposed that is similar in spirit to the electron turnstile except that it operates within a quantum Hall fluid. In the integer quantum Hall regime, this device pumps an integer number of electrons per cycle. In the fractional regime, it pumps an integer number of fractionally charged quasiparticles per cycle. It is proposed that such a device can make an accurate measurement of the charge of the quantum Hall effect quasiparticles. | ABSTRACTThis paper aims to develop, assess, and numerically implement analytical models for the newly introduced Quintuple Friction Pendulum Isolator (QFPI) which can identically capture its real e... | eng_Latn | 3,944 |
Approaching graph problems with continuous variable quantum computing | We introduce a method for solving the Max-Cut problem using a variational algorithm and a continuous-variables quantum computing approach. The quantum circuit consists of two parts: the first one embeds a graph into a circuit using the Takagi decomposition and the second is a variational circuit which solves the Max-Cut problem. We analyze how the presence of different types of non-Gaussian gates influences the optimization process by performing numerical simulations. We also propose how to treat the circuit as a machine learning model. | We consider finite-horizon LQR control with limited controller-system communication. Within a time-horizon T , the controller can only communicate with the system d <; T times. We present an explicit expression on the optimal control data schedule for unstable first-order systems and a class of higher-order systems. We also discuss when such a control data schedule remains optimal (or is near optimal) for general systems. | eng_Latn | 3,945 |
Convolutional Entanglement Distillation | We develop a theory of entanglement distillation that exploits a convolutional coding structure. We provide a method for converting an arbitrary classical binary or quaternary convolutional code into a convolutional entanglement distillation protocol. The yield and error-correcting properties of such a protocol depend respectively on the rate and error-correcting properties of the imported classical convolutional code. In a convolutional entanglement distillation protocol, two parties sharing noisy ebits can distill noiseless ebits “online” as they acquire more noisy ebits and this online protocol reduces decoding complexity. | CN filtering units that is for titanium pigment recovery of waste water in titanium pigment industry is used for primary brine process in test. The filtering efficiency is improved, and the target of diaphragm electrolysis brine is met. The units is low investment, simple operation, stable efficiency, and simplify the process of brine production. | eng_Latn | 3,946 |
New perspectives on quantum correlations | By performing well-chosen measurements on an entangled quantum state, distant observers can establish quantum non-local correlations. Gaining insight to such correlations is a challenging problem, important for both understanding the foundations of quantum mechanics and for developing applications in quantum information science. Here I present recent works progressing in this direction. In particular, after reviewing Bell's local model for quantum correlations, I will review Leggett's model, which focuses on individual properties. The incompatibility of both of these models with quantum predictions allows one to identify necessary conditions that any model aiming at reproducing the quantum correlations should satisfy. Remarkably, these constraints indicate a natural resource for simulating entanglement, namely the non-local box of Popescu and Rohrlich. I will conclude by reviewing such simulation models and discuss the insight they offer for understanding the relation between entanglement and non-locality. | This paper presents some preliminary results from an empirical study of 12 Java applications from the Qualitas corpus. We measure the quantity and distribution of exception-handling constructs, and study their change as the systems evolve through several versions. | yue_Hant | 3,947 |
Multi-Domain Translation by Learning Uncoupled Autoencoders | Multi-domain translation seeks to learn a probabilistic coupling between marginal distributions that reflects the correspondence between different domains. We assume that data from different domains are generated from a shared latent representation based on a structural equation model. Under this assumption, we show that the problem of computing a probabilistic coupling between marginals is equivalent to learning multiple uncoupled autoencoders that embed to a given shared latent distribution. In addition, we propose a new framework and algorithm for multi-domain translation based on learning the shared latent distribution and training autoencoders under distributional constraints. A key practical advantage of our framework is that new autoencoders (i.e., new domains) can be added sequentially to the model without retraining on the other domains, which we demonstrate experimentally on image as well as genomics datasets. | We analyze non-Markovian evolution of open quantum systems. It is shown that any dynamical map representing evolution of such a system may be described either by non-local master equation with memory kernel or equivalently by equation which is local in time. These two descriptions are complementary: if one is simple the other is quite involved, or even singular, and vice versa. The price one pays for the local approach is that the corresponding generator keeps the memory about the starting point `t_0'. This is the very essence of non-Markovianity. Interestingly, this generator might be highly singular, nevertheless, the corresponding dynamics is perfectly regular. Remarkably, singularities of generator may lead to interesting physical phenomena like revival of coherence or sudden death and revival of entanglement. | eng_Latn | 3,948 |
Computed tomography using broadband Bessel THz beams and phase contrast. | We present new results demonstrating the capability of performing computed tomography (CT) using broadband Bessel terahertz (THz) beams. Nondiffractive beams such as these exhibit propagation-invariant lines of focus with an extended depth-of-field compared to conventional Gaussian beams. Using this property, we demonstrate a considerable improvement in the 3D reconstruction image of a synthetic sample through the backprojection algorithm. Only when THz Bessel beams are used, a full reconstruction of the object structure is made. Moreover, we use phase-contrast mechanism which improves the spatial resolution and reconstructed images. Our results highlight the potential in using nondiffractive Bessel beams to significantly improve 3D-image reconstruction of THz CT. | Recently, a large number of protocols for bidirectional controlled state teleportation (BCST) have been proposed using n-qubit entangled states ($$n\in \{5,6,7\}$$n?{5,6,7}) as quantum channel. Here, we propose a general method of selecting multiqubit $$(n>4)$$(n>4) quantum channels suitable for BCST and show that all the channels used in the existing protocols of BCST can be obtained using the proposed method. Further, it is shown that the quantum channels used in the existing protocols of BCST form only a negligibly small subset of the set of all the quantum channels that can be constructed using the proposed method to implement BCST. It is also noted that all these quantum channels are also suitable for controlled bidirectional remote state preparation. Following the same logic, methods for selecting quantum channels for other controlled quantum communication tasks, such as controlled bidirectional joint remote state preparation and controlled quantum dialogue, are also provided. | eng_Latn | 3,949 |
Doublet-quartet energy separation in boron: A partitioned-correlation- function-interaction method | No lines have been observed for transitions between the doublet and quartet levels of B i. Consequently, energy levels based on observation for the latter are obtained through extrapolation of wavelengths along the isoelectronic sequence for the 2s22p 2P3/2o - 2s2p2 4P5/2 transition. In this paper, accurate theoretical excitation energies from a partitioned-correlation- function-interaction (PCFI) method are reported for B i that include both relativistic effects in the Breit-Pauli approximation and a finite mass correction. Results are compared with extrapolated values from observed data. For B i our estimate of the excitation energy 28 959 ± 5 cm-1 is in better agreement with the values obtained by Edlen (1969) than those reported by Kramida and Ryabtsev (2007). Our method is validated by applying the same procedure to the separation of these levels in C ii. © 2013 American Physical Society. | We develop a theory of entanglement distillation that exploits a convolutional coding structure. We provide a method for converting an arbitrary classical binary or quaternary convolutional code into a convolutional entanglement distillation protocol. The yield and error-correcting properties of such a protocol depend respectively on the rate and error-correcting properties of the imported classical convolutional code. In a convolutional entanglement distillation protocol, two parties sharing noisy ebits can distill noiseless ebits “online” as they acquire more noisy ebits and this online protocol reduces decoding complexity. | eng_Latn | 3,950 |
Source for macroscopic entangled states | Abstract New scheme to conditionally produce two types of macroscopic entangled states is developed. The studied system consists of the system of coupled down converters with type-I phase matching pumped simultaneously by powerful optical fields in coherent states, one auxiliary photon in superposition state of two input modes and projective measurement system used in output generated modes. Given scheme works without photon number resolving detection. Moreover, an analysis of “separation” between components of the entangled states and influence of detector inefficiency on fidelity of the scheme is accomplished. | Abstract The new interest of a study of the incoherent γ-ray scattering on bound electrons is pointed out. An experimental set-up is described; it allows angular- and energy-distribution measurements on germanium K-shell electrons. Performances and preliminary results obtained with an incoming energy of 662 keV are given. | eng_Latn | 3,951 |
Measurement and the Quantum World | The quantum theory of measurement and its development are explained. The basis for viewing measurement in quantum mechanics as a genuine physical, rather than psychophysical process or a process that depends on consciousness or the mental, is given and defended against the critiques of Bell and others. The notion of quantum measurement as the actualization of quantum potentiality as grounded in the related versions advocated by Heisenberg and Shimony is explicated in the context of the theory of positive-operator-valued measures. Quantum interference is discussed as a process of interference of quantum potentialities in contradistinction to the interference of some material substance or the interference of probability waves. This provides the basis for a valid realist interpretation of quantum theory. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,952 |
Quantifying model uncertainty in dynamical systems driven by non-Gaussian Lévy stable noise with observations on mean exit time or escape probability | Abstract Complex systems are sometimes subject to non-Gaussian α -stable Levy fluctuations. A new method is devised to estimate the uncertain parameter α and other system parameters, using observations on mean exit time or escape probability for the system evolution. It is based on solving an inverse problem for a deterministic, nonlocal partial differential equation via numerical optimization. The existing methods for estimating parameters require observations on system state sample paths for long time periods or probability densities at large spatial ranges. The method proposed here, instead, requires observations on mean exit time or escape probability only for an arbitrarily small spatial domain. This new method is beneficial to systems for which mean exit time or escape probability is feasible to observe. | A quantum financial approach to finite games of strategy is addressed, with an extension of Nash's theorem to the quantum financial setting, allowing for an entanglement of games of strategy with two-period financial allocation problems that are expressed in terms of: the consumption plans' optimization problem in pure exchange economies and the finite-state securities market optimization problem, thus addressing, within the financial setting, the interplay between companies' business games and financial agents' behavior.A complete set of quantum Arrow-Debreu prices, resulting from the game of strategy's quantum Nash equilibrium, is shown to hold, even in the absence of securities' market completeness, such that Pareto optimal results are obtained without having to assume the completeness condition that the rank of the securities' payoff matrix is equal to the number of alternative lottery states. | eng_Latn | 3,953 |
From the No-Signaling Theorem to Veiled Non-locality | According to the no-signaling theorem, the nonlocal collapse of the wavefunction of an entangled particle by the measurement on its twin particle at a remote location cannot be used to send useful information. Given that experiments on nonlocal correlations continue to have loopholes, we propose a stronger principle that the nonlocality of quantum mechanics itself is veiled. In practical terms, decoherence and noise compels us to view the wavefunction as representing knowledge of potential outcomes rather than the reality. Experimental evidence in favor of naked nonlocality would support the view of the wavefunction as an objective description of physical reality. | We consider in this work some class of strongly perturbed for the semilinear wave equation with conformal power nonlinearity. We obtain an optimal estimate for a radial blow-up solution and we have also obtained two less stronger estimates. These results are achieved in three-steps argument by the construction of a Lyapunov functional in similarity variables and the Pohozaev identity. | eng_Latn | 3,954 |
Quantum Violations of N-Qubit Svetlichny's Inequalities are Tightly Bound by the Exclusivity Principle | We first present, by using exclusivity principle, a brief proof of the complementarity principle: the sum of squared expectation values of dichotomic (±1) mutually complementary observables can not be greater than 1. Then we prove that the complementarity principle yields tight quantum bounds of violations of N-qubit Svetlichny's inequalities. This result not only demonstrates that exclusivity principle can give tight quantum bound for certain type of genuine multipartite correlations, but also illustrates the subtle relationship between quantum complementarity and quantum genuine multipartite correlations. | We show that for every Dugundji compact K of weight ℵ1 the Banach space C(K) is 1Plichko and the space P (K) of probability measures on K is Valdivia compact. Combining this result with the existence of a non-Valdivia compact group, we answer a question of Kalenda. | eng_Latn | 3,955 |
Gradient Based Quantum Optimal Control in a Chopped Basis | We propose a quantum optimal control algorithm that performs a gradient descent in a reduced basis named GRadient Optimization Using Parametrization (GROUP). We compare this optimization algorithm to the other state-of-the-art algorithms in quantum control namely, Gradient-Ascent Pulse Engieering (GRAPE), Krotov's method and Nelder-Mead using Chopped Random Basis (CRAB). We find that GROUP converges much faster than Nelder-Mead with CRAB and achieves better results than GRAPE and Krotov's method on the control problem presented here. | In this paper, we show how genetic programming (GP) can be used to evolve system-size-independent quantum algorithms, and present a human-competitive Quantum Fourier Transform (QFT) algorithm evolved by GP. | eng_Latn | 3,956 |
Quantum statistical inference for density estimation | A new penalized likelihood method for non-parametric density estimation is proposed, which is based on a mathematical analogy to quantum statistical physics. The mathematical procedure for density estimation is related to maximum entropy methods for inverse problems; the penalty function is a convex information divergence enforcing global smoothing toward default models, positivity, extensivity and normalization. The novel feature is the replacement of classical entropy by quantum entropy, so that local smoothing may be enforced by constraints on the expectation values of differential operators. Although the hyperparameters, covariance, and linear response to perturbations can be estimated by a variety of statistical methods, we develop the Bayesian interpretation. The linear response of the MAP estimate is proportional to the covariance. The hyperparameters are estimated by type-II maximum likelihood. The method is demonstrated on standard data sets. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,957 |
Ultrafast Monolayer In/Gr-WS2-Gr Hybrid Photodetectors with High Gain | One of the primary limitations of previously reported two-dimensional (2D) photodetectors is a low frequency response (≪ 1 Hz) for sensitive devices with gain. Yet, little efforts have been devoted to improve the temporal response of photodetectors while maintaining high gain and responsivity. Here, we demonstrate a gain of 6.3 × 103 electrons per photon and a responsivity of 2.6 × 103 A/W while simultaneously exhibiting an ultrafast response time of 40–65 μs in a hybrid photodetector that consists of graphene-WS2-graphene junctions covered with indium (In) adatoms atop. The resultant responsivity is 6 orders of magnitude higher than that of conventional photodetectors comprising solely of a Au-WS2-Au junction. The photogain is provided mainly by the adsorbed In adatoms, from which photogenerated electrons can be transferred to the WS2 channel, while holes remain trapped in In adatoms, leading to a photogating effect as electrons are recirculating during the residence of holes in In adatoms. At a gate vol... | Abstract New scheme to conditionally produce two types of macroscopic entangled states is developed. The studied system consists of the system of coupled down converters with type-I phase matching pumped simultaneously by powerful optical fields in coherent states, one auxiliary photon in superposition state of two input modes and projective measurement system used in output generated modes. Given scheme works without photon number resolving detection. Moreover, an analysis of “separation” between components of the entangled states and influence of detector inefficiency on fidelity of the scheme is accomplished. | eng_Latn | 3,958 |
A Modified Chi2 Algorithm for Discretization | Since the ChiMerge algorithm was first proposed by Kerber (1992), it has become a widely used and discussed discretization method. The Chi2 algorithm is a modification to the ChiMerge method. It automates the discretization process by introducing an inconsistency rate as the stopping criterion and it automatically selects the significance value. In addition, it adds a finer phase aimed at feature selection to broaden the applications of the ChiMerge algorithm. However, the Chi2 algorithm does not consider the inaccuracy inherent in ChiMerge's merging criterion. The user-defined inconsistency rate also brings about inaccuracy to the discretization process. These two drawbacks are first discussed in this paper and modifications to overcome them are then proposed. By comparison, results with the original Chi2 algorithm using C4.5, the modified Chi2 algorithm, performs better than the original Chi2 algorithm. It becomes a completely automatic discretization method. | We study the dynamic of the Gaussian quantum discord in a continuous-variable system subject to a common non-Markovian environment with zero-temperature. By considering an initial two-mode Gaussian symmetric squeezed thermal state, we show that Gaussian discord has a very different dynamic characteristic in a non-Markovian evolution versus a Markov process, and can be created by the memory effect, which features non-Markovianity. We also study the relationship between Gaussian discord and the non-Markovian degree of the environment. The results may offer us an effective experimental method to get more quantum correlations. | eng_Latn | 3,959 |
Explicit traveling wave solutions of K(n,-n,2n)equation and it's dynamical behavior | Some explicit traveling wave solutions of equation K(n,-n,2n) are focused on with the help of qualitative theory and bifurcation theory of dynamical system.The dynamical behavior of traveling wave solutions helps to decide whether to choose the solutions or not,thus,some wrong information is possible to be given by precise explicit traveling wave solutions.That is,it is necessary to understand the dynamical behavior of the traveling wave solutions before finding the precise explicit traveling solutions.At last,the related conclusions are testified by means of numerical simulations. | Abstract How well can we manipulate the state of a particle via a discrete-time quantum walk? We show that the discrete-time quantum walk on a one-dimensional infinite chain with coin operators that are independent of the position can only realize product operators of the form e i ξ A ⊗ 1 p , which cannot change the position state of the walker. We present a scheme to construct all possible realizations of all the product operators of the form e i ξ A ⊗ 1 p . When the coin operators are dependent on the position, we show that the translation operators on the position can not be realized via a DTQW with coin operators that are either the identity operator 1 or the Pauli operator σ x . | eng_Latn | 3,960 |
Scheme for teleportation of atomic states within cavities in thermal states | An experimentally feasible scheme is proposed for the teleportation of an atomic state and of a two-atom entangled state within the microwave cavity quantum electrodynamics with unit probability of success. Our scheme is based on the interaction between atoms and a single-mode nonresonant cavity with the assistance of a strong classical driving field. Thus the teleportation scheme is insensitive to the thermal state. This idea can also be used to teleport an arbitrary two-atom pure state via two pairs of atomic Einstein-Podolsky-Rosen states in a straightforward way. | This paper aims to contribute to our understanding of the sociomaterial complexities of information systems. By applying Gilles Deleuze’s process ontology, called Assemblage Theory (AT), as interpreted and presented by Manuel DeLanda, we examine the case of a new high-tech medical procedure called transcatheter aortic valve implantation (TAVI). Complex innovations like TAVI evolve as sociomaterial assemblages whose dynamics are seen as driven by the interaction between various stabilizing and de-stabilizing processes. We argue that AT is a very powerful (process) ontology for researching and theorizing the dynamics of increasingly complex information systems. | eng_Latn | 3,961 |
Evolution of a human-competitive quantum fourier transform algorithm using genetic programming | In this paper, we show how genetic programming (GP) can be used to evolve system-size-independent quantum algorithms, and present a human-competitive Quantum Fourier Transform (QFT) algorithm evolved by GP. | For at least two decades, Alfio Quarteroni has been at the forefront of research on fluid dynamics, especially in the most complicated type of problems: those in which a moving fluid interacts with a flexible surface. He is perhaps most noted for his role as the chief scientific advisor for the Swiss team that won the America’s Cup yacht race in 2003 and defended its title successfully in 2007. The team’s secret weapon was computational fluid dynamics, which they used to obtain the largest possible performance improvements from tiny tweaks in the shape of the boat. | eng_Latn | 3,962 |
Entanglement-based quantum key distribution without an entangled-photon source | A quantum key distribution scheme is described, in which a time (or phase) entangled-photon pair posteriorly generated by a single-photon source and a simple beam splitter. This scheme offers an efficient entanglement-based quantum key distribution system superior to the system using a standard parametric down-converter. | A new class of high order, implicit, three time step schemes for semi-discretized wave equations is introduced and studied. These schemes are constructed using the modified equation approach, generalizing the @q-scheme. Their stability properties are investigated via an energy analysis, which enables us to design super-convergent schemes and also optimal stable schemes in terms of consistency errors. Specific numerical algorithms for the fully discrete problem are tested and discussed, showing the efficiency of our approach compared to second order @q-schemes. | eng_Latn | 3,963 |
A quantum mechanical MO study of the effect of doping on the electronic band structure of a benzodiimidazole polymer | Abstract Electronic band structures were investigated for undoped poly(p-phenylene benzodiimidazole) (PDIAB) and also PDIAB doped with the electron acceptors iodine and bromine. The axial band gap of 1.55 eV calculated for the undoped polymer is close to those calculated for the structurally similar model compounds for polymers, benzobisoxazole and benzobisthiazole. The band structures are well illustrated by the superposition of the bands for the undoped polymer chain and as well as the polymer chain in the presence of dopant based upon the assumption of the rigid band model (RBM). The band structures of the iodine- and bromine-doped PDIAB polymers indicate strong polymer-dopant interactions, and the lowering of the Fermi level indicates semiconducting characteristics to some extent. | We analyze the dynamics of a qubit-resonator system coupled with a thermal bath and external electromagnetic fields. Using the evolution equations for the set of Heisenberg operators that describe the whole system, we derive an expression for the resonator field, accounting for the resonator-drive, -bath, and -qubit interaction. The renormalization of the resonator frequency caused by the qubit-resonator interaction is accounted for. Using solutions for the resonator field, we derive the equation describing qubit dynamics. The influence of the qubit evolution during measurement time on the fidelity of a single-shot measurement is studied. The relation between fidelity and measurement time is shown explicitly. Also, an expression describing relaxation of the superposition qubit state toward its stationary value is derived. The possibility of controlling this state by varying the amplitude and frequency of drive is shown. | eng_Latn | 3,964 |
Energy stability of droplets and dry spots in a thin film model of hanging drops | The 2-D thin film equation describing the evolution of hang drops is studied. All radially symmetric steady states are classified, and their energy stability is determined. It is shown that the droplet with zero contact angle is the only global energy minimizer and the dry spot with zero contact angle is a strict local energy minimizer. | In this paper, we carry out statistical fluctuation analysis for the new proposed measurement-device-independent quantum key distribution with heralded single-photon sources and further compare its performance with the mostly often used light sources, i.e., the weak coherent source. Due to a significantly lower probability for events with two photons present on the same side of the beam splitter in former than in latter, it gives drastically reduced quantum bit error rate in the X basis and can thus show splendid behavior in real-life implementations even when taking statistical fluctuations into account. | eng_Latn | 3,965 |
Quantum transport and localization in biased periodic structures under bi- and polychromatic driving | We consider the dynamics of a quantum particle in a one-dimensional periodic potential (lattice) under the action of a static and time-periodic field. The analysis is based on a nearest-neighbour tight-binding model which allows a convenient closed form description of the transport properties in terms of generalized Bessel functions. The case of bichromatic driving is analysed in detail and the intricate transport and localization phenomena depending on the communicability of the two excitation frequencies and the Bloch frequency are discussed. The case of polychromatic driving is also discussed, in particular for flipped static fields, i.e. rectangular pulses, which can support an almost dispersionless transport with a velocity independent of the field amplitude. | We address the recently posed question as to whether the nonlocality of a single member of an entangled pair of spin $1/2$ particles can be shared among multiple observers on the other wing who act sequentially and independently of each other [1]. We first show that the optimality condition for the trade-off between information gain and disturbance in the context of weak or non-ideal measurements emerges naturally when one employs a one-parameter class of positive operator valued measures (POVMs). Using this formalism we then prove analytically that it is impossible to obtain violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality by more than two Bobs in one of the two wings using unbiased input settings with an Alice in the other wing. | eng_Latn | 3,966 |
A General Method for Selecting Quantum Channel for Bidirectional Controlled State Teleportation and Other Schemes of Controlled Quantum Communication | Recently, a large number of protocols for bidirectional controlled state teleportation (BCST) have been proposed using n-qubit entangled states ($$n\in \{5,6,7\}$$n?{5,6,7}) as quantum channel. Here, we propose a general method of selecting multiqubit $$(n>4)$$(n>4) quantum channels suitable for BCST and show that all the channels used in the existing protocols of BCST can be obtained using the proposed method. Further, it is shown that the quantum channels used in the existing protocols of BCST form only a negligibly small subset of the set of all the quantum channels that can be constructed using the proposed method to implement BCST. It is also noted that all these quantum channels are also suitable for controlled bidirectional remote state preparation. Following the same logic, methods for selecting quantum channels for other controlled quantum communication tasks, such as controlled bidirectional joint remote state preparation and controlled quantum dialogue, are also provided. | In this paper, an improved genetic algorithm to solve the unicast routing problem with QoS restrictions is proposed. The proposed algorithm uses real-coded strategy, which has unique crossover strategy, mutation strategy and fitness function, and in addition, the strategy of introducing alien species is adopted in the algorithm, in order to enhance the algorithm's global search ability. The simulation results show that the improved algorithm has a very good convergence performance and global search ability, and guarantees a reasonable success rate in finding the QoS unicast routing. | eng_Latn | 3,967 |
Constraint satisfaction and decision under uncertainty based on qualitative possibility theory | This paper surveys the modeling capabilities of qualitative possibility theory in decision analysis for the representation and the aggregation of preferences, for the treatment of uncertainty and for the handling of situations similar to previously encountered ones. "Qualitative" here means that we restrict ourselves to linearly ordered valuation sets (only the ordering of the grades is meaningful) for the assessment of preferences, uncertainty and similarity. Moreover all the evaluations are referred to the same valuation set (commensurability assumption). Such a qualitative structure is poor but not very demanding from an elicitation point of view; however it is sufficient for giving birth to a valuable set of modeling tools. | Interferometric precision with N uncorrelated particles is bounded by the standard quantum limit (SQL). We report deterministic generations of entangled atomic states as well as their sensing precisions more than 8dB beyond the SQL. | eng_Latn | 3,968 |
Is the Preferred Basis selected by the environment? | We show that in a quantum measurement, the preferred basis is determined by the interaction between the apparatus and the quantum system, instead of by the environment. This interaction entangles three degrees of freedom, one system degree of freedom we are interested in and preserved by the interaction, one system degree of freedom that carries the change due to the interaction, and the apparatus degree of freedom which is always ignored. Considering all three degrees of freedom the composite state only has one decomposition, and this guarantees that the apparatus would end up in the expected preferred basis of our daily experiences. We also point out some problems with the environment-induced super-selection (Einselection) solution to the preferred basis problem, and clarifies a common misunderstanding of environmental decoherence and the preferred basis problem. | The paper introducess the implemented conditions which colling recycle of flexible base on Ying-DaLine.It over all xpounds the investigation of road condlitions of original pavement,indoor trial study,determination of trial lot plan as well as completion of trial lot etc. | eng_Latn | 3,969 |
The statistical fluctuation analysis for the measurement-device-independent quantum key distribution with heralded single-photon sources | In this paper, we carry out statistical fluctuation analysis for the new proposed measurement-device-independent quantum key distribution with heralded single-photon sources and further compare its performance with the mostly often used light sources, i.e., the weak coherent source. Due to a significantly lower probability for events with two photons present on the same side of the beam splitter in former than in latter, it gives drastically reduced quantum bit error rate in the X basis and can thus show splendid behavior in real-life implementations even when taking statistical fluctuations into account. | Let $\mu$ be a general stochastic measure, where we assume for $\mu$ only $\sigma$-additivity in probability and continuity of paths. We prove that the symmetric integral $\int_{[0,T]}f(\mu_t, t)\circ\,{\rm d}\mu_t$ is well defined. For stochastic equations with this integral, we obtain the existence and uniqueness of a solution. | eng_Latn | 3,970 |
Quantum State Tomography: 'the best' is the enemy of 'good enough' | In this paper, we examine a variety of strategies for numerical quantum-state estimation from data of the sort commonly measured in experiments involving quantum state tomography. We find that, in some important circumstances, an elaborate and time-consuming numerical optimization to obtain 'the best' density matrix corresponding to a given data set is not necessary, and that cruder, faster numerical techniques may well be 'good enough'. | The latest results from ATLAS and CMS on single top quark production and rare production channels of top quarks at the LHC are presented. | eng_Latn | 3,971 |
Quantum capacity of lossy channel with additive classical Gaussian noise : a perturbation approach | For a quantum channel of additive Gaussian noise with loss, in the general case of $n$ copies input, we show that up to first order perturbation, any non-Gaussian perturbation to the product thermal state input has a less quantum information transmission rate when the input energy tend to infinitive. | We perform Monte–Carlo simulations of a lattice gauge system with an action which contains two parallel plaquettes. The action is defined as a product of gauge group variables over two parallel plaquettes belonging to a given three-dimensional cube. The peculiar property of this system is that it has strong degeneracy of the vacuum state inherited from the corresponding gonihedric Z2 gauge spin system. These vacua are well separated and cannot be connected by a gauge transformation. We measure different observables in these vacua and compare their properties. | eng_Latn | 3,972 |
Analysis and extension of some problems in Probability | Through discussing the concept of exponential distribution in probability,the definition of the generalized exponential distribution definition is given.The uniform distribution and the exponential distribution random variable linear function is also proved separately obeys the uniform distribution and the exponential distribution.In addition,the answers of two common questions in theory of Probability are analyzed. | We review a new formalism based on Orlicz spaces for the description of large regular statistical systems. Our presentation includes both classical and quantum systems. This approach has the advantage that statistical mechanics is much better settled. | eng_Latn | 3,973 |
An adaptive mutation method for GA based on relative importance | A new adaptive mutation method, which uses the information of relative importance of chromosomes and alleles, is proposed for genetic algorithm(GA). In each generation, suitable chromosomes for mutation are automatically choosed based on cumulative distribution function of chromosomes fitness, without requiring to set the mutation probability anymore. After selecting chromosomes for mutation, the standard deviations of allele of all loci are used to decide the number of mutational loci and choose appropriate loci to undergo mutation. To protect good genes on a fit chromosome, the fitness information is included into loci selection by weighting the standard deviations of allele with fitness probability. The results of benchmark testing show the mutation method always has better results and higher speed than traditional mutation method. | In this paper, we show how genetic programming (GP) can be used to evolve system-size-independent quantum algorithms, and present a human-competitive Quantum Fourier Transform (QFT) algorithm evolved by GP. | eng_Latn | 3,974 |
Estimation error analysis due to aggregation interval | Thesis (M.S.)--Wichita State University, College of Engingeering, Dept. of Electrical Engineering and Computer Science | Interferometric precision with N uncorrelated particles is bounded by the standard quantum limit (SQL). We report deterministic generations of entangled atomic states as well as their sensing precisions more than 8dB beyond the SQL. | eng_Latn | 3,975 |
Wigner Function of Density Operator for Negative Binomial Distribution | By using the technique of integration within an ordered product (IWOP) of operator we derive Wigner function of density operator for negative binomial distribution of radiation field in the mixed state case, then we derive the Wigner function of squeezed number state, which yields negative binomial distribution by virtue of the entangled state representation and the entangled Wigner operator. | For a large class of vanilla contingent claims, we establish an explicit F\"ollmer-Schweizer decomposition when the underlying is a process with independent increments (PII) and an exponential of a PII process. This allows to provide an efficient algorithm for solving the mean variance hedging problem. Applications to models derived from the electricity market are performed. | eng_Latn | 3,976 |
Selective correlations in finite quantum systems and the Desargues property | The Desargues property is well known in the context of projective geometry. An analogous property is presented in the context of both classical and Quantum Physics. In a classical context, the Desargues property implies that two logical circuits with the same input, show in their outputs selective correlations. In general their outputs are uncorrelated, but if the output of one has a particular value, then the output of the other has another particular value. In a quantum context, the Desargues property implies that two experiments each of which involves two successive projective measurements, have selective correlations. For a particular set of projectors, if in one experiment the second measurement does not change the output of the first measurement, then the same is true in the other experiment. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,977 |
Vector quantization of spherically invariant random processes | Vector quantization of spherically invariant random processes (SIRP) is considered. Especially, trellis coded quantization (TCQ) and lattice vector quantization (LVQ) are investigated. For performance evaluations a random number generator has been developed producing sequences which can be regarded as SIRP realizations. It turns out that in most cases the TCQ outperforms all other investigated quantization methods, even those LVQ schemes which are matched to the properties of SIRP sources. Comparisons with bounds from rate distortion theory are given as well. | We review a new formalism based on Orlicz spaces for the description of large regular statistical systems. Our presentation includes both classical and quantum systems. This approach has the advantage that statistical mechanics is much better settled. | eng_Latn | 3,978 |
Modeling quantum information dynamics achieved with time-dependent driven fields in the context of universal quantum processing | Quantum information is a useful resource to set up information processing. Despite physical components are normally two-level systems, their combination with entangling interactions becomes in a complex dynamics. Studied for piecewise field pulses, this work analyzes the modeling for quantum information operations with fields affordable technologically towards a universal quantum computation model. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,979 |
An) analysis of quantum cryptography vulnerability by Binary merge | In this paper, quantum cryptography systems used in the design process inevitably open bit stream of pseudo-random number that exists multiple open channels between them and the need to share information on the part of the situation exposes a pair of bit stream. In this paper, the base test of pseudo-random number I tested out this process and the merge bit binary column look out for randomness. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,980 |
JTAG Flash Programming Using Boundary-scan | This article introduces one of the most popular Flash programming technologyusing JTAG technology to program Flash,consists of three components.First it describes the theory of programming Flash using JTAG,then explains the strongpoint of this method.Last analyses the performance of the experiment detailedly. | W e investigate the entanglem entofa quantumeld in the expanding universe.By introducing a bipartite system using a coarse-grained scalareld,we apply the separability criterion based on the partialtranspose operation and num erically calculate the bipartite entanglem entbetween separatespatialregions.W end thattheinitialentangled statebecom esseparableordisentangled afterthespatialseparation oftwo pointsexceed the Hubblehorizon.Thisprovidesthe necessary condition for the appearance ofclassicality ofthe quantum uctuation. W e also investigate the condition ofclassicality thatthequantumeld can betreated astheclassicalstochasticvariables. | kor_Hang | 3,981 |
Quantum sliding mode control via error sliding surface | In this paper, a new quantum sliding mode control, for improving the performance of the two-level quantum sliding mode control systems with bounded uncertainties, is introduced. The presented quant... | Bottom-up holographic models of QCD, inspired by the anti-de Sitter space/conformal field theory correspondence, have shown a remarkable degree of phenomenological success. However, they rely on a number of bold assumptions. We investigate the reliability of one of the key assumptions, which involves matching the parameters of these models to QCD at high 4D momentum q{sup 2} and renormalization scale {mu}{sup 2}. We show that this leads to phenomenological and theoretical inconsistencies for scale-dependent quantities such as . | eng_Latn | 3,982 |
High fidelity quantum teleportation assistance with quantum neural network | In this paper, a high fidelity scheme of quantum teleportation based on quantum neural network (QNN) is proposed. The QNN is composed of multi-bit control-not gates. The quantum teleportation of a qubit state via two-qubit entangled channels is investigated by solving the master equation in Lindblad operators with a noisy environment. To ensure the security of quantum teleportation, the indirect training of QNN is employed. Only 10% of teleported information is extracted for the training of QNN parameters. Then the outputs are corrected by the other QNN at Bob's side. We build a random series of numbers ranged in [0, π] as inputs and simulate the properties of our teleportation scheme. The results show that the fidelity of quantum teleportation system is significantly improved to approach 1 by the error-correction of QNN. It illustrates that the distortion can be eliminated perfectly and the high fidelity of quantum teleportation could be implemented. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,983 |
The effect of entanglement in gravitational photon-photon scattering | The differential cross-section for gravitational photon-photon scattering calculated in perturbative quantum gravity is shown to depend on the degree of polarization entanglement of the two photons. The interaction between photons in the symmetric Bell state is stronger than between not entangled photons. In contrast, the interaction between photons in the anti-symmetric Bell state is weaker than between not entangled photons. The results are interpreted in terms of quantum interference, and it is shown how they fit into the idea of distance-dependent forces. | The information entropy is applied to determine the weight of all the factors those impacting water quality and water quantity,and on the basis of this,a comprehensive assessment is made on Zhengzhou City in combination with the fuzzy cluster analysis.The result shows that the method solves the problem of the weight distribution better with a more reasonable and reliable conclusion,which is consistent with the status of the groundwater environment in Zhengzhou and provides a good basis for the restoration of the groundwater environment therein in the days to come. | eng_Latn | 3,984 |
Teleportation two-qubit state by using two different protocols | In this contribution, two versions of teleportation protocol are considered, based on either using a single or two copies of entangled atom-field state, respectively. It is shown that, by using the first version, the fidelity of the teleported state as well as the amount of quantum Fisher information, that contains in the teleported state, are much better than using the second version. In general, one may increases the fidelity of teleported information by increasing the mean photon number and decreasing the detuning parameter. The fidelity of teleporting classical information is much better than teleporting quantum information. Moreover, teleportating classical information that initially encoded in an exited states is much better than that encodes in the ground states. However, the teleported Fisher information that initially encoded in a ground state is much larger than those initially encoded in entangled states. | Aspects of the science and the ways of doing science characteristic of the two senior scientists of Quantum Theory Project (QTP) in the period 1969–1985 are discussed from the perspective of the only QTP faculty member of that era who did not grow up in either the Lowdin or Slater schools. | eng_Latn | 3,985 |
All joint von Neumann measurements on a quantum state admit a quasi-classical probability model | We prove that the Hilbert space description of all joint von Neumann measurements on a quantum state can be reproduced in terms of a single measure space ({\Omega}, F, {\mu}) with a normalized real-valued measure {\mu}, that is, in terms of a new general probability model, the quasi-classical probability model, developed in [Loubenets: J. Math. Phys. 53 (2012), 022201; J. Phys. A: Math. Theor. 45 (2012), 185306]. In a quasi-classical probability model for all von Neumann measurements, a random variable models the corresponding quantum observable in all joint measurements and depends only on this quantum observable. This mathematical result sheds a new light on some important issues of quantum randomness discussed in the literature since the seminal article (1935) of Einstein, Podolsky and Rosen. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,986 |
Bit-oriented quantum public-key encryption | We propose a bit-oriented quantum public-key scheme which uses Boolean function as private-key and randomly changed pairs of quantum state and classical string as public-keys. Contrast to the typical classical public-key scheme, one private-key in our scheme corresponds to an exponential number of public-keys. The goal of our scheme is to achieve information-theoretic security, and the security analysis is also given. | Abstract Kim et al. (Appl. Math. Inf. Sci. 9(6):1-6, 2015) consider the q -extensions of Boole polynomials. In this paper, we consider Witt-type formula for the q -Boole polynomials with weights and derive some new interesting identities and properties of those polynomials and numbers from the Witt-type formula which are related to special polynomials and numbers. | eng_Latn | 3,987 |
Quantum correlations between two non-interacting atoms under the influence of a thermal environment | By considering a double Jaynes—Cummings model, we investigate the dynamics of quantum correlations, such as the quantum discord and the entanglement, for two atoms in their respective noisy environments, and study the effect of the purity and the cavity temperature on the quantum correlations. The results show that the entanglement suffers sudden death and revival, however the quantum discord can still reveal the quantum correlations between the two atoms in the region where the entanglement is zero. Moreover, when the temperature of each cavity is high the entanglement dies out in a short time, but the quantum discord still survives for quite a long time. It means that the quantum discord is more resistant to environmental disturbance than the entanglement at higher temperatures. | We consider an approach to fault tolerant quantum computing based on a simple error detecting code operating as the substrate for a conventional surface code. We develop a customised decoder to process the information about the likely location of errors, obtained from the error detect stage, with an advanced variant of the minimum weight perfect matching algorithm. A threshold gate-level error rate of 1.42% is found for the concatenated code given highly asymmetric noise. This is superior to the standard surface code and remains so as we introduce a significant component of depolarising noise; specifically, until the latter is 70% the strength of the former. Moreover, given the asymmetric noise case, the threshold rises to 6.24% if we additionally assume that local operations have 20 times higher fidelity than long range gates. Thus for systems that are both modular and prone to asymmetric noise our code structure can be very advantageous. | eng_Latn | 3,988 |
Picture-perfect Quantum Key Distribution | We provide a new way to bound the security of quantum key distribution using only two high-level, diagrammatic features of quantum processes: the compositional behavior of complementary measurements and the essential uniqueness of purification. We begin by demonstrating a proof in the simplest case, where the eavesdropper doesn't noticeably disturb the channel at all and has no quantum memory. We then show how this approach extends straightforwardly to account for an eavesdropper with quantum memory and the presence of noise. | We show that for every Dugundji compact K of weight ℵ1 the Banach space C(K) is 1Plichko and the space P (K) of probability measures on K is Valdivia compact. Combining this result with the existence of a non-Valdivia compact group, we answer a question of Kalenda. | eng_Latn | 3,989 |
Controlling chaos in higher dimensional maps with constant feedback: an analytical approach. | We introduce two methods to control chaos in higher-dimensional discrete maps with constant feedback. It is analytically shown for a general class of function vectors that chaotic attractors can be converted into fixed point attractors. Additionally, a method to choose an appropriate constant feedback is presented. The application of these methods does not require a priori knowledge of system equations, since time series information can be used. Desired periodic orbits can be accessed by varying the constant feedback. As an example, the methods are applied to the Hénon map. | Quantum Mechanics at Planck scale is considered as a deformation of the conventional Quantum Mechanics. Similar to the earlier works of the author, the main object of deformation is the density matrix. On this basis a notion of the entropy density is introduced that is a matrix value used for a detail study of the Information Problem at the Universe, and in particular, for the Information Paradox Problem. | eng_Latn | 3,990 |
A spectral characterization for generalized quantum gates | In this article, we prove that a contraction A on a separable Hilbert space is not a generalized quantum gate (or a convex combination of unitaries) if and only if A is a semi-Fredholm with ind A≠0 and a compact perturbation of a partial isometry. | The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands. | eng_Latn | 3,991 |
Decoys fix quantum key swapping | British researchers find a way to close a potential flaw in quantum communication systems. | It's a Topsy-Turvy world and that's a fact US plans to change daylight saving hours this spring could wreak havoc on computer systems, Gartner claims. The analyst firm said utomated systems could run haywire this March.⦠| eng_Latn | 3,992 |
How do QR codes work? | How does QR code work? | What's the trick to a Rubik's Cube? | eng_Latn | 3,993 |
Quantum Deep Learning | A unified architecture for natural language processing: deep neural networks with multitask learning | Running Out of Space: Models of Information Navigation | kor_Hang | 3,994 |
Ef fi ciently measuring a quantum device using machine learning | auto - encoding variational bayes . | Scene completion using millions of photographs | eng_Latn | 3,995 |
Sparse Coding-Inspired Optimal Trading System for HFT Industry | Learning to Trade via Direct Reinforcement | Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations | eng_Latn | 3,996 |
Compact and Computationally Efficient Representation of Deep Neural Networks | Quantum-Chemical Insights from Deep Tensor Neural Networks | A Language-Independent Neural Network for Event Detection. | eng_Latn | 3,997 |
A quantum circuit to find discrete logarithms on ordinary binary elliptic curves in depth O(log^2 n) | Improving over an earlier construction by Kaye and Zalka, Maslov et al. describe an implementation of Shor's algorithm which can solve the discrete logarithm problem on binary elliptic curves in quadratic depth O(n^2). In this paper we show that discrete logarithms on such curves can be found with a quantum circuit of depth O(log^2 n). As technical tools we introduce quantum circuits for GF(2^n) multiplication in depth O(log n) and for GF(2^n) inversion in depth O(log^2 n). | Let q be a positive integer, and L(s, χ ) the Dirichlet L -function corresponding to a Dirichlet character χ mod q . We put where χ runs over all Dirichlet characters mod q except for the principal character χ 0 . | eng_Latn | 3,998 |
Which book will be more prefer to study quantum mechanics? | What is the best book on Quantum Mechanics? | What are some good books to read to prepare for CAT? | eng_Latn | 3,999 |
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