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题名: Dynamic generation of entangling wave packets in XY spin system with decaying long-range couplings
作者: Yang Shuo ;  Song Zhi ;  Sun ChangPu
刊名: SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY
出版日期: 2008
卷号: 51, 期号:1, 页码:45-55
关键词: QUANTUM CHAINS ;  ENTANGLEMENT ;  STATE
学科分类: Physics
通讯作者: Yang, S , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
英文摘要: The dynamic generation of spin entanglement between two distant sites in a XY model with 1/r(2) decay long-range couplings was studied. Due to the linear dispersion relation epsilon(k)similar to|k| of magnons in such a model, a well-located spin state can be dynamically split into two moving entangled local wave packets without changing their shapes. Interestingly, when such two wave packets meet at the diametrically opposite site after the fast period tau = N pi/J, the initial well-located state is completely recurrent. Numerical calculation was performed to confirm the analytical result even if the ring system of sizes N up to several thousands is considered. The truncation approximation for the coupling strengths was also studied. Numerical simulation shows that the above conclusions still hold even if the range of the coupling strength is truncated to a relatively short scale compared with the size of the spin system.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000251412500006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5606
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:
Yang Shuo,Song Zhi,Sun ChangPu. Dynamic generation of entangling wave packets in XY spin system with decaying long-range couplings[J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,2008,51(1):45-55.
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