Quantum discord in the three-spin XXZ chain with Dzyaloshinskii-Moriya interaction

被引:8
|
作者
Zhu YinYan [1 ]
Zhang Yong [1 ]
机构
[1] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
基金
中国国家自然科学基金;
关键词
quantum discord; XXZ-spin chain; DM interaction; Ornstein-Uhlenbeck noise; WEAK FERROMAGNETISM;
D O I
10.1007/s11433-012-4871-x
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The quantum discord (QD) of a three-qubit Heisenberg XXZ system with the Dzyaloshinskii-Moriya (DM) interaction parameter is investigated, and the three-qubit QD under Ornstein-Uhlenbeck noise is calculated. We find that both DM interaction parameter D (z) and anisotropic parameter J (z) can increase QD and entanglement but D (z) is a more efficient parameter in the antiferromagnetic case. We observe a complex range of QD with the change of D (z) and a sudden change of QD with the variation of J (z) in the ferromagnetic case. We show that the decrease durations of both QD and entanglement can be prolonged by increasing DM interaction and reducing noise bandwidth gamma in the evolutionary process.
引用
收藏
页码:2081 / 2087
页数:7
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