Quantum discord in three-spin XXZ chain with three-spin interaction

被引：6
|
作者：
Yue HaiDi [1 ,2 ]
Zhang Yong [2 ]
Gong Jian [1 ]
机构：
[1] Inner Mongolia Univ, Sch Phys Sci & Technol, Hohhot 010021, Peoples R China
[2] Beijing Univ Posts & Telecommun, Dept Phys, Beijing 100876, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2012年 / 55卷 / 09期
基金：
中国国家自然科学基金;
关键词：
quantum discord; three-spin interaction; XXZ-spin chain; THERMAL ENTANGLEMENT; DECOHERENCE;
D O I：
10.1007/s11433-012-4800-z
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum discord, as a kind of measurement of quantum correlation, has received much attention since it was introduced. This paper focuses on studying quantum discord in three-spin XXZ chain with three-spin interaction. The effects of all kinds of parameters on quantum discord in the ferromagnetic region J=-1 are studied. The three-spin interaction may increase the value of quantum discord between two spins, while the anisotropy may decrease the value. In addition, the regrowth of quantum discord with temperature is found in the model. For zero temperature, quantum phase transition is existent.
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页码：1641 / 1645
页数：5
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