期刊论文

Entanglement and quantum phase transition in the two-qubit Heisenberg model under a magnetic field

中文

武汉轻工大学学报

2095-7386

2014

33

1

57-60

10.3969/j.issn.2095-7386.2014.01.014

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（201112Z15,2012RZ09）；

本校为第一机构

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。

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 fiel...