Non-Markovian Dynamic of Gaussian Quantum Discord in Continuous-Variable Systems

• Authors: X. Liu , W. Wu
• Languages of publication: EN

Abstracts

EN

We show the special dynamic characteristic of Gaussian quantum discord, exhibited by two-mode Gaussian symmetric squeezed thermal states (STS) in continuous-variable (CV) systems with a common non-Markovian environment, is definitely different from Markov processes. We demonstrate that Gaussian quantum discord can be created whenever the information flow from environment back to the system. We also show that the rate of decrease for Gaussian quantum discord is related to the coupling constant. We discover that the initial value of Gaussian quantum discord is determined by the average number of thermal photons of the system.

Keywords

EN

03.65.Yz; 03.65.Ta; 03.65.Ud; 03.67.Mn

Discipline

• 03.65.Ud: Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)(for entanglement production and manipulation, see 03.67.Bg; for entanglement measures, witnesses etc., see 03.67.Mn; for entanglement in Bose-Einstein condensates, see 03.75.Gg)
• 03.65.Yz: Decoherence; open systems; quantum statistical methods(see also 03.67.Pp in quantum information; for decoherence in Bose-Einstein condensates, see 03.75.Gg)
• 03.65.Ta: Foundations of quantum mechanics; measurement theory(for optical tests of quantum theory, see 42.50.Xa)
• 03.67.Mn: Entanglement measures, witnesses, and other characterizations(see also 03.65.Ud Entanglement and quantum nonlocality; 42.50.Dv Quantum state engineering and measurements in quantum optics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 3
• Pages: 652-656

Dates

published

2014-08

received

2014-01-29

(unknown)

2014-06-09

Contributors

author

X. Liu

• Department of Physics, School of Science, Wuhan University of Technology (WHUT), Wuhan, China

author

W. Wu

• Department of Physics, School of Science, Wuhan University of Technology (WHUT), Wuhan, China

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Identifiers

DOI

10.12693/APhysPolA.126.652