| XXZ自旋信道中的纠缠演化 |
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| 引用本文： | 苏晓强.XXZ自旋信道中的纠缠演化[J].山西师范大学学报,2010(4). |
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| 作者姓名： | 苏晓强 |
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| 作者单位： | 山西师范大学物理与信息工程学院; |
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| 基金项目： | 山西师范大学自然科学基金(YZ08014) |
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| 摘 要： | 本文系统地研究了XXZ型自旋信道的纠缠演化,发现对于某些初态,纠缠在演化的过程中会出现突然死亡的现象;进一步研究了自旋信道的长度和各向异性对纠缠演化的影响,发现自旋个数的增加会使退相干得到加强,并且使得纠缠死亡的时间延长,而各向异性参数对纠缠演化也有很大影响,死亡时间会随参数增大而缩短,而纠缠的回复则会变弱.
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| 关 键 词： | XXZ自旋链 自旋信道 纠缠猝死 |
Entanglement Evolution in an XXZ Spin Channel |
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| SU Xiao-qiang.Entanglement Evolution in an XXZ Spin Channel[J].Journal of Shanxi Teachers University,2010(4). |
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| Authors: | SU Xiao-qiang |
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| Institution: | SU Xiao-qiang(School of Physics and Information Engineering,Shanxi Normal University,Linfen 041004,Shanxi,China) |
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| Abstract: | We study the dynamic evolution of the entanglement in a spin channel with XXZ-type interaction,and find that the phenomenon of entanglement sudden death(ESD) appears in the evolution of entanglement for some initial states.Further,we investigate the effect of the length and the anisotropy on the entanglement evolution,find that the decoherene is enhanced and the death time becomes longer with the increasing of the number of sites.The effect of the anisotropy is also obvious,the death time becomes shorter wi... |
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| Keywords: | XXZ chain spin channel entanglement sudden death |
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