QUANTUM DISCORD UNDER SYSTEM-ENVIRONMENT COUPLING: THE TWO-QUBIT CASE

被引：9
作者：
Xu, Jin-Shi [1 ]
Li, Chuan-Feng [1 ]
机构：
[1] Univ Sci & Technol China, CAS, Key Lab Quantum Informat, Hefei 230026, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2013年 / 27卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
Quantum discord; classical correlation; system-environment coupling; ENTANGLEMENT; DYNAMICS; DECOHERENCE;
D O I：
10.1142/S0217979213450549
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Open quantum systems have attracted great attention, since inevitable coupling between quantum systems and their environment greatly affects the features of interest of these systems. Quantum discord, is a measure of the total nonclassical correlation in a quantum system that includes, but is not exclusive to, the distinct property of quantum entanglement. Quantum discord can exist in separated quantum states and plays an important role in many fundamental physics problems and practical quantum information tasks. There have been numerous investigations on quantum discord and its counterpart classical correlation. This short review focuses on highlighting the system-environment dynamics of two-qubit quantum discord and the influence of initial system-environment correlations on the dynamics of open quantum systems. The external control effect on the dynamics of open quantum systems are involved. Several related experimental works are discussed.
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页数：18
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