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在非均匀磁场中Dzialoshinskii-Moriya相互作用对伊辛链热纠缠的影响

, PP. 329-334

Keywords: 量子光学,量子纠缠,伊辛模型,DM相互作用,Negativity理论

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Abstract:

采用Negativity理论研究了具有Dzyaloshinskii-Moriya(DM)相互作用的伊辛模型在非均匀磁场中的纠缠特性。结果发现,DM相互作用的存在明显的增强两量子比特间的热纠缠并且能够把纠缠增加到一个最大值0.5;而外磁场具有减小热纠缠的作用。温度的高低也直接影响热纠缠。另外,讨论了磁场的非均匀性对伊辛链热纠缠的影响,在一定程度上,非均匀磁场对热纠缠的影响类似于匀强磁场。研究表明可以通过调节DM相互作用强度、外磁场大小和温度高低来控制热纠缠。

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