点击次数：

论文类型： 期刊论文

发表时间： 2009-02-01

发表刊物： INTERNATIONAL JOURNAL OF QUANTUM INFORMATION

收录刊物： SCIE

卷号： 7

期号： 1

页面范围： 385-393

ISSN号： 0219-7499

关键字： Entanglement evolution; non-Markovian process

摘要： The entanglement evolution of a pair of two-level systems is studied in this paper. The two systems without mutual interaction are independently coupled to different two-band non-Markovian environments. By comparing our results to others in the literature, we find that taking one of the Bell states as the initial state, certain non-Markovian effect protects the entanglement in short time scale, while on long time scale it leads to the entanglement sudden death (ESD), which never occurs for this initial state in the Markovian case. Finally, by analyzing the parameters in our model, a relation between disentanglement and decoherence is established and discussed.