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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.
2005
发表期刊PHYSICS LETTERS A
ISSN0375-9601
卷号342期号:40910页码:30-35
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.
部门归属Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Energy Levels Ladders Systems
学科领域Physics
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收录类别SCI
WOS记录号WOS:000230248100004
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13786
专题理论物理所1978-2010年知识产出
通讯作者Song, Z , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
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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.
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