| Thermal Entanglement of Anisotropic XY Chains in a Transverse Field |
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| 作者姓名： | 翟孝月 童培庆 |
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| 作者单位： | [1]Department of Physics, Nanjing Normal University, Nanjing 210097 [2]Institute of Science, PLA University of Science and Technology, Nanjing 210007 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 90203009, 10175035 and 10674072, the Specialized Research Fund for the Doctoral Programme （SRFDP） of Higher Education under Grant No 20060319007, and by the Excellent Young Teacher Programme of the Ministry of Education of China. |
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| 摘 要： | By using the concept of concurrence, we numerically investigate the thermal entanglement between any two nearest-neighbour spins in uniform and periodic anisotropic XY chains in a transverse field at finite temperature T. It is found that the entanglement has more than one critical temperatures on some parameter regions for uniform and periodic chains. We also discuss the behaviour of the thermal entanglement at the vicinity of quantum phase transition of periodic anisotropic XY chains and find that a11 the derivatives aλC have similar behaviour as that of the uniform chain.
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| 关 键 词： | 热缠结 各向异性 横梁领域 物理学 |
| 收稿时间： | 2007-4-1 |
| 修稿时间： | 2007-04-01 |
Thermal Entanglement of Anisotropic XY Chains in a Transverse Field |
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| ZHAI Xiao-Yue,TONG Pei-Qing.Thermal Entanglement of Anisotropic XY Chains in a Transverse Field[J].Chinese Physics Letters,2007,24(9):2475-2478. |
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| Authors: | ZHAI Xiao-Yue TONG Pei-Qing |
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| Institution: | 1. Department of Physics, Nanjing Normal University, Nanjing 210097; 2.Institute of Science, PLA University of Science and Technology, Nanjing 210007 |
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| Abstract: | |
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| Keywords: | 03 67 -a 03 65 Ud 05 50 +q 75 10 Jm |
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