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论文类型：期刊论文

发表时间：2008-08-01

发表刊物：Maurice Jacob Memorial Meeting

收录刊物：SCIE、CPCI-S

卷号：78

期号：2

ISSN号：0031-8949

摘要：We investigate the entanglement property of a two-qubit, mixed-spin, Heisenberg system under a nonuniform magnetic field. We show that increasing b can improve the threshold temperature, and can also make the entanglement enhanced. It is very interesting to note that the joining of the nonuniform magnetic field b can not only induce the entanglement for the ferromagnetic case, but can also make the entanglement symmetrical in terms of J for a larger value of b, while the uniform field B cannot do this. We also analyze the ground-state entanglement features in detail.