Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field

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	Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
	Zhang, GF ; Li, SS
刊名	physical review a
	2005
卷号	72 期号:3 页码:art.no.034302
关键词	QUANTUM COMPUTATION
ISSN号	1050-2947
通讯作者	zhang, gf, chinese acad sci, inst semicond, state key lab superlattices & microstruct, pob 912, beijing 100083, peoples r china. 电子邮箱地址: gf1978zhang2001@yahoo.com
中文摘要	the thermal entanglement in a two-qubit heisenberg xxz spin chain is investigated under an inhomogeneous magnetic field b. we show that the ground-state entanglement is independent of the interaction of z-component j(z). the thermal entanglement at the fixed temperature can be enhanced when j(z) increases. we strictly show that for any temperature t and j(z), the entanglement is symmetric with respect to zero inhomogeneous magnetic field, and the critical inhomogeneous magnetic field b(c) is independent of j(z). the critical magnetic field b-c increases with the increasing parallel to b parallel to but the maximum entanglement value that the system can arrive at becomes smaller.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-03-17
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/8490]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Zhang, GF,Li, SS. Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field[J]. physical review a,2005,72(3):art.no.034302.
APA	Zhang, GF,&Li, SS.(2005).Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field.physical review a,72(3),art.no.034302.
MLA	Zhang, GF,et al."Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field".physical review a 72.3(2005):art.no.034302.