Entanglement Dynamics of Quantum States Undergoing Decoherence from a Driven Critical Environment  

作　　者：马小三 乔莹 刘晓东 王安民 

机构地区：[1]School of Electric Engineering and Information,Anhui University of Technology [2]Department of Modern Physics,University of Science and Technology of China

出　　处：《Communications in Theoretical Physics》2013年第10期410-414,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11105001,10975125,11004001,and 11375168

摘　　要：In this paper,we have investigated the quantum entanglement of quantum states undergoing decoherence from a spin environment which drives a quantum phase transition.From our analysis,we find that the entanglement dynamics depends not only on the coupling strength but also on the external magnetic field and the number of the freedom degrees of the environment.Specially,our results imply that the decay of the entanglement can be enhanced by the quantum phase transition of the environment when the system is coupled to the environment weakly.Additionally,the discussion of the case of the multipartite states with high dimensions is made.

关 键 词：quantum entanglement entanglement dynamics quantum phase transition 

分 类 号：O431.2[机械工程—光学工程]