Quantum Discord and Entanglement Distribution as the Flow of Correlations Through a Dissipative Quantum System

被引：0

作者：

Quinn, N. ^{[1
]}

Croal, C. ^{[1
]}

Korolkova, N. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

来源：

JOURNAL OF RUSSIAN LASER RESEARCH | 2015年 / 36卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

quantum communication; quantum discord; quantum correlations; open systems; entanglement;

D O I：

10.1007/s10946-015-9533-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we study the propagation of quantum correlations in open quantum systems using quantum discord as their measure. The role of system-environment correlations in discord dynamics and some operational interpretations of discord are discussed, in particular, activation of correlations into entanglement. The quantum nature of correlations is studied in systems of optical modes, that is, Gaussian quantum states. A counter-intuitive scheme of entanglement distribution by an auxiliary mode, which remains separable at all times, is analyzed to unveil the synergy of coherence and dissipation in quantum protocols with mixed states.

引用

页码：550 / 561

页数：12

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