Abstract 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.
Received: 14 October 2008
Revised: 02 December 2008
Accepted manuscript online:
(Granular models of complex systems; traffic flow)
Fund: Project supported by National
Natural Science Foundation of China (Grant No 10374007).
Cite this article:
Zeng Hong-Fang(曾红芳), Shao Bin(邵彬), Yang Lin-Guang(杨林广), Li Jian(李建), and Zou Jian(邹健) Entanglement sudden death induced by the Dzialoshinskii--Moriya interaction 2009 Chin. Phys. B 18 3265
Reduction of impurity confinement time by combined heating of LHW and ECRH in EAST Zong Xu(许棕), Zhen-Wei Wu(吴振伟), Ling Zhang(张凌), Yue-Heng Huang(黄跃恒), Wei Gao(高伟), Yun-Xin Cheng(程云鑫), Xiao-Dong Lin(林晓东), Xiang Gao(高翔), Ying-Jie Chen(陈颖杰), Lei Li(黎嫘), Yin-Xian Jie(揭银先), Qing Zang(臧庆), Hai-Qing Liu(刘海庆), and EAST team. Chin. Phys. B, 2021, 30(7): 075205.
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