Entanglement sudden death induced by the
Dzialoshinskii-Moriya interaction
Zeng Hong-Fang;Shao Bin;Yang Lin-Cuang;Li Jian;Zou Jian
【期刊名称】《中国物理：英文版》 【年(卷),期】2009(018)008
【摘要】In this paper,we study the entanglement dynamics of two-spin Heisenberg XYZ model with the Dzialoshinskii Moriya (DM) interaction.The system is initially prepared in the Werner state.The effects of purity of the initial state and DM coupling parameter on the evolution of entanglement are investigated.The necessary and sufficient condition for the appearance of the entanglement sudden death (ESD) phenomenon has been deduced.The result shows that the ESD always occurs if the initial state is sufficiently impure for the given coupling parameter or the DM interaction is sufficiently strong for the given initial state.Moreover,the critical values of them are calculated. 【总页数】6页(3265-3270) 【关键词】
【作者】Zeng Hong-Fang;Shao Bin;Yang Lin-Cuang;Li Jian;Zou Jian 【作者单位】Department of Physics,School of Sciences,Beijing Institute of Technology,Beijing 100081,China;Department of Physics,School of Sciences,Beijing
Institute
of
Technology,Beijing
100081,China;Department of Physics,School of Sciences,Beijing Institute
Entanglement sudden death induced by the Dzialoshinskii-Moriya interaction
