| Entanglement in Anisotropic Heisenberg Model with Non-Uniform External Fields |
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| 作者姓名： | 王远峰 曹俊鹏 王玉鹏 |
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| 作者单位： | Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No TIMS041J. |
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| 摘 要： |
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| 关 键 词： | Heisenberg模型 量子纠缠 各向异性 外部磁场 |
| 收稿时间： | 2005-05-31 |
| 修稿时间： | 2005-05-31 |
Entanglement in Anisotropic Heisenberg Model with Non-Uniform External Fields |
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| Wang YuanFeng;Cao JunPeng;Wang YuPeng.Entanglement in Anisotropic Heisenberg Model with Non-Uniform External Fields[J].Chinese Physics Letters,2005,22(9):2151-2153. |
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| Authors: | Wang YuanFeng;Cao JunPeng;Wang YuPeng |
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| Abstract: | We study entanglement properties of the three-qubit anisotropic Heisenberg model with both uniform and nonuniform external magnetic fields. Analytic expressions for the measures of entanglement at the ground state are obtained. We show that the pairwise entanglement and global entanglement of the system at the ground state clearly depend on the strength and configuration of external fields. The entanglement between some pairs can be enhanced by non-uniform external fields. |
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