Engineering antiferromagnetic Heisenberg spin chains for maximizing of the groundstate entanglement

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	Engineering antiferromagnetic Heisenberg spin chains for maximizing of the groundstate entanglement
	Xin, R; Song, Z; Sun, CP; Song, Z , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
刊名	PHYSICS LETTERS A
	2005
卷号	342 期号:40910 页码:30-35
关键词	Energy Levels Ladders Systems
ISSN号	0375-9601
英文摘要	We study the correlation function and concurrence for the eigenstates with zero spin of engineered Heisenberg models to explore the entanglement property. It is shown that the total nearest neighbor (NN) correlation function of zero-spin eigenstates reaches its local extremum when the coupling strength is uniform, and correspondingly the groundstate entanglement of d-D cubic AF Heisenberg model is locally maximized. Moreover, numerical calculations for a N-site quantum spin ring with cosinusoidally modulated exchange coupling, i.e., J(i) = J(1 + cos(2 pi i/N)), indicate that the uniform coupling is not the unique optimal distribution for maximizing the groundstate entanglement and this modulation of interactions can induce the longer range entanglement. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000230248100004
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13786]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Song, Z , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
推荐引用方式 GB/T 7714	Xin, R,Song, Z,Sun, CP,et al. Engineering antiferromagnetic Heisenberg spin chains for maximizing of the groundstate entanglement[J]. PHYSICS LETTERS A,2005,342(40910):30-35.
APA	Xin, R,Song, Z,Sun, CP,&Song, Z , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China..(2005).Engineering antiferromagnetic Heisenberg spin chains for maximizing of the groundstate entanglement.PHYSICS LETTERS A,342(40910),30-35.
MLA	Xin, R,et al."Engineering antiferromagnetic Heisenberg spin chains for maximizing of the groundstate entanglement".PHYSICS LETTERS A 342.40910(2005):30-35.