Entanglement of a two-qubit anisotropic Heisenberg XYZ chain in nonuniform magnetic fields

Entanglement of a two-qubit anisotropic Heisenberg XYZ chain in nonuniform magnetic

fields with intrinsic decoherence

Xu Xiao-Bo;Liu Jin-Ming;Yu Peng-Fei

【期刊名称】《中国物理：英文版》 【年(卷),期】2008(017)002

【摘要】Taking the intrinsic decoherence effect into account,this paper investigates the entanglement of a two-qubit anisotropic Heisenberg XY Z model in the presence of nonuniform external magnetic fields by employing the concurrence as entanglement measure.It is found that both the intrinsic decoherence and the anisotropy of the system give a significant suppression to the entanglement.Moreover it finds that the initial state of the system plays an important role in the time evolution of the entanglement,which means that the entanglement of the system is independent of the nonuniformity and uniformity of the magnetic field when the system is in the initial state |ψ(0)>=|00>and |ψ(0)>=m |01＞+n|10＞,respectively. 【总页数】6页(456-461)

【关键词】Heiscnberg XY Z chain,concurrence,magnetic field,intrinsic decoherence

【作者】Xu Xiao-Bo;Liu Jin-Ming;Yu Peng-Fei

【作者单位】Key Laboratory of Optical and Magnetic Resonance

Spectroscopy,Department of Physics,East China Normal

University,Shanghai 200062,China;Key Laboratory of Optical and Magnetic Resonance Spectroscopy,Department of Physics,East China Normal University,Shanghai 200062,China;Key Laboratory of Optical and Magnetic Resonance Spectroscopy,Department of Physics,East China Normal University,Shanghai 200062,China 【正文语种】中文 【中图分类】O4 【相关文献】

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