| XXZ海森堡模型的热量子关联 |
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| 引用本文： | 桂卫军. XXZ海森堡模型的热量子关联[J]. 量子光学学报, 2012, 18(3): 236-240 |
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| 作者姓名： | 桂卫军 |
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| 作者单位： | 南昌工程学院理学系,江西南昌,330099 |
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| 摘 要： | 处于热场中的两比特XXZ自旋体系用正则系综表示,基于该系综的密度矩阵,求出了量子关联(用quantum discord描述,简称QD)以及QD的几何测量。通过用图示的方法针对各向同性XXZ自旋体系的QD(包括其几何测量)以及纠缠度的比较,可以看出量子关联比量子纠缠具有更优越的抗噪声能力。
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| 关 键 词： | XXZ自旋体系 热场 量子关联 |
| 收稿时间： | 2011-12-21 |
Thermal Quantum Correlation of XXZ Heisenberg Model |
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| GUI Wei-jun. Thermal Quantum Correlation of XXZ Heisenberg Model[J]. Acta Sinica Quantum Optica, 2012, 18(3): 236-240 |
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| Authors: | GUI Wei-jun |
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| Affiliation: | GUI Wei-jun(Department of Science,Nanchang Institute of Technology,Nanchang,Jiangxi 330099,China) |
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| Abstract: | Two-qubit XXZ spin system in the thermal field can be described by canonical ensembles, based on the density matrix, of which, we can solve there quantum correlation (described by quantum discord, QD) and geometric measurement of QD. By comparing the behaviour of QD (including GMQD) and concurrence for the anisotropic XXZ spin system with graphical method under the influence of thermal field, one can see that quantum correlation exhibits more robust than concurrence when the quantum system is exposed to enviroment. |
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| Keywords: | XXZ spin system thermal field quantum correlation |
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