Results 1 to 10 of about 773 (174)
Time-frequency-based detection using discrete-time discrete-frequency Wigner distributions [PDF]
IEEE Transactions on Signal Processing, 2002 During the last decade, a comprehensive theory for optimum time-frequency (TF)-based detection has been developed. This was originally proposed in the continuous-time continuous-frequency case. This paper deals with detectors operating on discrete-time discrete-frequency Wigner distributions (WDs). The purpose is to discuss some existing definitions of
Richard, Cédric
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Quantum eigenstates from classical Gibbs distributions [PDF]
SciPost Physics, 2021 We discuss how the language of wave functions (state vectors) and associated non-commuting Hermitian operators naturally emerges from classical mechanics by applying the inverse Wigner-Weyl transform to the phase space probability distribution and ...
Pieter W. Claeys, Anatoli Polkovnikov
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A New Discrete Analytic Signal for Reducing Aliasing in the Discrete Wigner-Ville Distribution [PDF]
IEEE Transactions on Signal Processing, 2008 It is not possible to generate an alias-free discrete Wigner--Ville distribution (DWVD) from a discrete analytic signal. This is because the discrete analytic signal must satisfy two mutually exclusive constraints. We present, in this article, a new discrete analytic signal that improves on the commonly used discrete analytic signal's approximation of ...
John M O'Toole, Boualem Boashash
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Decoherence models for discrete-time quantum walks and their application to neutral atom experiments [PDF]
New Journal of Physics, 2014 We discuss decoherence in discrete-time quantum walks in terms of a phenomenological model that distinguishes spin and spatial decoherence. We identify the dominating mechanisms that affect quantum-walk experiments realized with neutral atoms walking in ...
Andrea Alberti +3 more
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Probability Representation of Quantum States
Entropy, 2021 The review of new formulation of conventional quantum mechanics where the quantum states are identified with probability distributions is presented. The invertible map of density operators and wave functions onto the probability distributions describing ...
Olga V. Man’ko, Vladimir I. Man’ko
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On computing the discrete Wigner–Ville distribution
Electronics Letters, 1990 The Wigner-Ville distribution is an important tool in nonstationary signal analysis. Many algorithms to compute the discrete Wigner-Ville distribution (DWVD) have been proposed. New efficient methods for computing the discrete Wigner-Ville distribution are presented.
Chan, SC, Ho, KL
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Comment on ‘Wigner function for a particle in an infinite lattice’
New Journal of Physics, 2013 It is pointed out that in a recent paper (2012 New J. Phys. 14 103009) in which a Wigner function for a particle in an infinite lattice (a system described by an unbounded discrete coordinate and its conjugate angle-like momentum) has been introduced, no
João P S Bizarro
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Linear redundancy of information carried by the discrete Wigner distribution [PDF]
IEEE Transactions on Signal Processing, 2001 The discrete Wigner distribution (WD) encodes information in a redundant fashion since it derives N by N representations from N-sample signals. The increased amount of data often prohibits its effective use in applications such as signal detection, parameter estimation, and pattern recognition.
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Discrete Wigner distribution for two qubits: a characterization of entanglement properties [PDF]
Journal of Physics A: Mathematical and General, 2006 We study the properties of the discrete Wigner distribution for two qubits introduced by Wotters. In particular, we analyze the entanglement properties within the Wigner distribution picture by considering the negativity of the Wigner function (WF) and the correlations of the marginal distribution.
Franco R., PENNA, Vittorio
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Estimation of instantaneous frequency using the discrete Wigner distribution
Electronics Letters, 1990 Analytical expressions for the performance of the discrete Wigner distribution (DWD) in estimating the instantaneous frequency of linear frequency modulated signals in additive white noise are derived and verified using simulation. It is shown that the DWD peak provides an optimal estimate at high input signal-to-noise ratios.
P. Rao, F.J. Taylor
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