Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir  

作　　者：廖湘萍 方见树 方卯发 

机构地区：[1]College of Science,Hunan University of Technology [2]College of Physics and Information Science,Hunan Normal University

出　　处：《Chinese Physics B》2010年第9期379-385,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.10374025);Hunan Provincial Natural Science Foundation of China (Grant No.06JJ4003);the Major Program for the Research Foundation of Education Bureau of Hunan Province,China (Grant No.08A015)

摘　　要：In this paper, we investigate the entanglement of two qubits coupled collectively to a common thermal environment and find that the the collective decay can lead to a revival of the entanglement that has already been destroyed. We also show that the ability of the system to revival entanglement relies on the mean photon number of the thermal environment and the degree of entanglement of the initial state.In this paper, we investigate the entanglement of two qubits coupled collectively to a common thermal environment and find that the the collective decay can lead to a revival of the entanglement that has already been destroyed. We also show that the ability of the system to revival entanglement relies on the mean photon number of the thermal environment and the degree of entanglement of the initial state.

关 键 词：sudden death of entanglement two qubits the thermal reservoir 

分 类 号：O431.2[机械工程—光学工程]