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理论物理通讯：英文版

Thermal Entanglement of a Three-Qubit Heisenberg Chain with a Nonuniform Magnetic Field

Yang, Guohui, Zhou, Ling

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

在一个不一致的磁场下面的 three-qubit 海森堡链的热纠纷被学习。注意下一件最近的邻居纠纷(NNNE ) 能比最近的邻居纠纷(NNE ) 大很有趣。我们分析扎根的州的纠纷，并且给 NNNE 比零温度附近的 NNE 大的条件。我们的结果也证明不一致的领域能导致纠纷并且在某些参数区域改进阀值温度。

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在一个不一致的磁场下面的 three-qubit 海森堡链的热纠纷被学习。注意下一件最近的邻居纠纷(NNNE ) 能比最近的邻居纠纷(NNE ) 大很有趣。我们分析扎根的州的纠纷，并且给 NNNE 比零温度附近的 NNE 大的条件。我们的结果也证明不一致的领域能导致纠纷并且在某些参数区域改进阀值温度。
The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement (NNNE) could be larger than the nearest neighbor entanglement (NNE). We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.