The negativity of Wigner function as a measure of quantum correlations
| Autor: | M. El Baz, Yassine Hassouni, Fatima-Zahra Siyouri |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum discord Wigner quasiprobability distribution Quantum dynamics Statistical and Nonlinear Physics Quantum entanglement Quantum tomography 01 natural sciences 010305 fluids & plasmas Theoretical Computer Science Electronic Optical and Magnetic Materials Modeling and Simulation Quantum mechanics 0103 physical sciences Signal Processing Method of quantum characteristics Wigner distribution function Electrical and Electronic Engineering 010306 general physics Amplitude damping channel |
| Zdroj: | Quantum Information Processing. 15:4237-4252 |
| ISSN: | 1573-1332 1570-0755 |
| DOI: | 10.1007/s11128-016-1380-2 |
| Popis: | In this paper, we study comparatively the behaviors of Wigner function and quantum correlations for two quasi-Werner states formed with two general bipartite superposed coherent states. We show that the Wigner function can be used to detect and quantify the quantum correlations. However, we show that it is in fact not sensitive to all kinds of quantum correlations but only to entanglement. Then, we analyze the measure of non-classicality of quantum states based on the volume occupied by the negative part of the Wigner function. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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