| 磁场中双量子位Heisenberg模型的纠缠与量子相变 |
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| 引用本文： | 黄海林,孙照宇. 磁场中双量子位Heisenberg模型的纠缠与量子相变[J]. 武汉工业学院学报, 2014, 0(1): 57-60 |
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| 作者姓名： | 黄海林 孙照宇 |
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| 作者单位： | 武汉轻工大学电气与电子工程学院,湖北武汉430023 |
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| 基金项目： | 国家自然科学基金资助项目（11204223）;武汉工业学院科研启动基金资助项目（201112215,2012RZ09）. |
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| 摘 要： | 以双量子位Heisenberg模型为例，讨论了磁场方向对纠缠的影响。结果表明：一定温度下，保持磁场的大小不变，仅改变其方向，不仅能获得最大纠缠，还产生了量子相变。
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| 关 键 词： | 纠缠 量子相变 Heisenberg模型 |
Entanglement and quantum phase transition in the two-qubit Heisenberg model under a magnetic field |
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| HUANG Hai-lin,SUN Zhao-yu. Entanglement and quantum phase transition in the two-qubit Heisenberg model under a magnetic field[J]. Journal of Wuhan Polytechnic University, 2014, 0(1): 57-60 |
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| Authors: | HUANG Hai-lin SUN Zhao-yu |
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| Affiliation: | (School of Electrical and Electronic Engineering, Wuhan Polytechnic University, Wuhan 430023, China) |
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| Abstract: | The effect of orientation in the magnetic field on the entanglement of a two-qubit Heisenberg model is in- vestigated. It is found that the maximum entanglement can be obtained by changing direction of the magnetic field with fixed magnitude at given temperature, i.e. driven by orientation of magnetic field. One of the most interesting facts, at zero temperature, is that quantum phase transition（QPT） can be take place through rotating the magnetic field. This can be regarded as magnetic direction induced QPT. |
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| Keywords: | entanglement quantum phase transition Heisenberg model |
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