| 各向异性非均匀海森堡XY链中的量子关联 |
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| 引用本文： | 程明,朱士群.各向异性非均匀海森堡XY链中的量子关联[J].量子光学学报,2012,18(3):223-229. |
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| 作者姓名： | 程明 朱士群 |
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| 作者单位： | 苏州大学物理科学与技术学院,苏州江苏,215006 |
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| 基金项目： | 国家自然科学基金(11074184) |
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| 摘 要： | 研究了各向异性非均匀海森堡周期性XY链中的量子失协(QD)和形成纠缠(EOF)。量子失协一般大于形成纠缠。两者之间的差距随着温度的升高或外磁场的增大而减小。调节各向异性系数的大小,可以发现,有些情况下形成纠缠已经消失,而量子失协仍然存在。在大部分参数区域内,量子失协总是大于形成纠缠。
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| 关 键 词： | 量子失协 形成纠缠 外磁场 非均匀周期性链 |
| 收稿时间： | 2012/3/13 |
Quantum Correlation in Anisotropic XY Model on Inhomogeneous Periodic Chain |
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| CHENG Ming
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ZHU Shi-qun.Quantum Correlation in Anisotropic XY Model on Inhomogeneous Periodic Chain[J].Acta Sinica Quantum Optica,2012,18(3):223-229. |
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| Authors: | CHENG Ming ZHU Shi-qun |
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| Institution: | (School of Physical Science and Technology,Soochow University,Suzhou,Jiangsu 215006,China) |
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| Abstract: | The thermal quantum discord (QD) and entanglement of formation (EOF) of an anisotropic XY model on the inhomogeneous periodic chain is investigated. The QD is higher than EOF. The difference between QD and EOF decreases when either the temperature or the external magnetic fields is increased. When the anisotropic parameter is varied, the QD is finite while the EOF is close to zero. The QD is always greater than EOF in most of the parameter regimes. |
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| Keywords: | thermal quantum discord entanglement of formation external magnetic field inhomogeneous periodic chain |
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