Dynamics of Quantum Entanglement in Reservoir with Memory Effects  

作　　者：HAO Xiang SHA Jin-Qiao SUN Jian ZHU Shi-Qun 郝翔;沙金巧;孙坚;朱士群(Department of Physics,School of Mathematics and Physics,Suzhou University of Science and Technology,Suzhou 215011,China;School of Physical Science and Technology,Suzhou University,Suzhou 215006,China)

机构地区：[1]Department of Physics,School of Mathematics and Physics,Suzhou University of Science and Technology,Suzhou 215011,China [2]School of Physical Science and Technology,Suzhou University,Suzhou 215006,China

出　　处：《Communications in Theoretical Physics》2012年第1期29-33,共5页理论物理通讯（英文版）

基　　金：Supported by the Project of Teaching Quality in SUST under Grant No. 2010JGB-27;the National Natural Science Foundation under Grant No. 10774108

摘　　要：The non-Markovian dynamics of quantum entanglement is studied by the Shabani-Lidar master equation when one of entangled quantum systems is coupled to a local reservoir with memory effects.The completely positive reduced dynamical map can be constructed in the Kraus representation.Quantum entanglement decays more slowly in the non-Markovian environment.The decoherence time for quantum entanglement can be markedly increased with the change of the memory kernel.It is found out that the entanglement sudden death between quantum systems and entanglement sudden birth between the system and reservoir occur at different instants.

关 键 词：entanglement dynamics master equation Kraus representation NON-MARKOVIAN 

分 类 号：O431.2[机械工程—光学工程]