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研究了有杂质时三量子位Heisenberg-XX链中正常格点之间的热纠缠情况,给出了Concurrence的解析表达式.进一步的讨论发现,杂质对正常格点的热纠缠有着重要的影响,甚至能够改变纠缠在反铁磁区的特性.理论表明,可以通过调节温度和杂质参数来控制纠缠.
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关键词:
- Heisenberg -XX链 /
- 热纠缠 /
- 杂质格点
In this paper,we study the effect of impurity on the thermal entanglement between the normal lattice in three-qubit Heisenberg XX chain,and give the analytical expression of the concurrence.According to the discussion of our result,we find that the impurity parameter has a great effect on the pairwise thermal entanglement,it even can change the characters of the entanglement to some degree.-
Keywords:
- Heisenberg-XX chain /
- thermal entanglement /
- impurity lattice
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