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题名: Characterizing entanglement by momentum jump in the frustrated Heisenberg ring at a quantum phase transition
作者: Qian, XF ;  Shi, T ;  Li, Y ;  Song, Z ;  Sun, CP
刊名: PHYSICAL REVIEW A
出版日期: 2005
卷号: 72, 期号:1, 页码:-
关键词: NEAREST-NEIGHBOR INTERACTION ;  LINEAR CHAIN
学科分类: Physics
通讯作者: Qian, XF , Nankai Univ, Dept Phys, Tianjin 30071, Peoples R China.
部门归属: Nankai Univ, Dept Phys, Tianjin 30071, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the pairwise concurrences, a measure of entanglement, of the ground states for the frustrated Heisenberg ring to explore the relation between entanglement and quantum phase transition associated with the momentum jump. The ground-state concurrences between any two sites are obtained analytically and numerically. It shows that the summation of all possible pairwise concurrences is an appropriate candidate to depict the phase transition. We also investigate the role that the momentum takes in the jump of concurrence at the critical points. We find that an abrupt momentum change results in the maximal concurrence difference of two degenerate ground states.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000230887300063
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13790
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Qian, XF,Shi, T,Li, Y,et al. Characterizing entanglement by momentum jump in the frustrated Heisenberg ring at a quantum phase transition[J]. PHYSICAL REVIEW A,2005,72(1):-.
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