Entanglement for Two-Qubit Extended Werner-Like States:Effect of Non-Markovian Environments  

作　　者：单传家 刘继兵 陈涛 程维文 刘堂昆 黄燕霞 李宏 

机构地区：[1]College of Physics and Electronic Science,Hubei Normal University

出　　处：《Communications in Theoretical Physics》2010年第9期427-432,共6页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.10904033;Natural Science Foundation of Hubei Province under Grant No.2009CDA145;Educational Commission of Hubei Province under Grant No.D20092204;the Postgraduate Programme of Hubei Normal University under Grant No.2007D20

摘　　要：We investigate the sudden birth and sudden death of entanglement of two qubits interacting with uncorrelated structured reservoirs. The system is initially prepared in two-qubit extended Werner-like state. We work out the dependence of the entanglement dynamics on both non-Markovian environments and the purity of initial state, and show that non-Markovian environments and the purity can control the time of the two-qubit entanglement sudden death and the reservoirs＇ entanglement sudden birth. Furthermore, under the conditions of different purity and initial entangIement, the revival of qubits＇ entanglement can manifest before, simultaneously or even after the disentanglement of their corresponding reservoirs.

关 键 词：entanglement dynamics zero-temperature bosonic reservoir non-Markovian environments 

分 类 号：O431.2[机械工程—光学工程]