Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations

doi:10.1088/1674-1056/22/8/080306

中国物理B ›› 2013, Vol. 22 ›› Issue (8): 80306-080306.doi: 10.1088/1674-1056/22/8/080306

Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations

肖瑞林^a, 肖兴^{a b}, 钟握军^a

a College of Physics and Electronics, Gannan Normal University, Ganzhou 341000, China;
b Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China

收稿日期:2012-12-16 修回日期:2013-02-26 出版日期:2013-06-27 发布日期:2013-06-27
基金资助:
Project supported by the Special Funds of the National Natural Science Foundation of China (Grant Nos. 11247006 and 11247207), the Scientific Research Foundation of Jiangxi Provincial Education Department (Grant Nos. GJJ12355 and GJJ13651), and the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 20122BAB212004 and 20132BAB212008).

Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations

Xiao Rui-Lin (肖瑞林)^a, Xiao Xing (肖兴)^{a b}, Zhong Wo-Jun (钟握军)^a

a College of Physics and Electronics, Gannan Normal University, Ganzhou 341000, China;
b Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China

Received:2012-12-16 Revised:2013-02-26 Online:2013-06-27 Published:2013-06-27
Contact: Xiao Xing E-mail:xiaoxing1121@gmail.com
Supported by:
Project supported by the Special Funds of the National Natural Science Foundation of China (Grant Nos. 11247006 and 11247207), the Scientific Research Foundation of Jiangxi Provincial Education Department (Grant Nos. GJJ12355 and GJJ13651), and the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 20122BAB212004 and 20132BAB212008).

摘要/Abstract

摘要： We analyze the dynamics of geometric measure of discord (GMOD) and measurement-induced non-locality (MIN) in the presence of initial system-reservoir correlations without Born and Markov approximation. Although the initial system-environment states have the same reduced density matrices for both the system and environment, the effects of different initial system-environment correlations have been shown to fundamentally alter the time evolution of GMOD and MIN between two quantum systems in both Markovian and non-Markovian regimes. In general, both GMOD and MIN experience a sudden increase for initially quantum-correlated states, and a sudden decrease for classical-correlated states before they reach the same stationary values with initially factorized states.

关键词: geometric measure of discord, measurement-induced non-locality, initial correlations

Abstract: We analyze the dynamics of geometric measure of discord (GMOD) and measurement-induced non-locality (MIN) in the presence of initial system-reservoir correlations without Born and Markov approximation. Although the initial system-environment states have the same reduced density matrices for both the system and environment, the effects of different initial system-environment correlations have been shown to fundamentally alter the time evolution of GMOD and MIN between two quantum systems in both Markovian and non-Markovian regimes. In general, both GMOD and MIN experience a sudden increase for initially quantum-correlated states, and a sudden decrease for classical-correlated states before they reach the same stationary values with initially factorized states.

Key words: geometric measure of discord, measurement-induced non-locality, initial correlations

中图分类号:

03.67.Ud

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.65.Vf (Phases: geometric; dynamic or topological)

肖瑞林, 肖兴, 钟握军. Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations[J]. 中国物理B, 2013, 22(8): 80306-080306.

Xiao Rui-Lin (肖瑞林), Xiao Xing (肖兴), Zhong Wo-Jun (钟握军). Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations[J]. Chin. Phys. B, 2013, 22(8): 80306-080306.

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Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations

Dynamics of measurement-induced non-locality and geometric discord with initial system–environment correlations

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