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外磁场下两量子比特海森堡XXZ模型中量子关联和热纠缠的研究

, PP. 185-191

Keywords: 量子光学,量子关联,热纠缠,quantum,discord,海森堡XXZ模型

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Abstract:

通过在两量子位上分别施加独立可控的外磁场()和(),以及改变耦合参数、磁场强度、磁场不均匀度和系统的温度,探讨了两量子比特XXZ模型中量子关联的变化行为,并在相同参数下与热纠缠做了比较。结果表明量子关联存在的参数范围比热纠缠更广;而且在一定的参数范围内,量子关联和热纠缠的变化展示出不同的行为。

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