外场驱动的两囚禁离子的纠缠突然消失的研究(英文)  

Study on entanglement sudden death of two trapped ions driven by external field

作　　者：王中结[1] 张侃[1] 

机构地区：[1]安徽师范大学物理与电子信息学院

出　　处：《原子与分子物理学报》2010年第3期497-502,共6页Journal of Atomic and Molecular Physics

基　　金：安徽省自然科学基金(090412060);安徽省教育厅自然科学基金(kJ2008A029)

摘　　要：研究了两囚禁离子与一束激光场相互作用模型.通过幺正变换,这个系统被变换成Tavis—Cum-mings模型.通过计算共生纠缠度,分析了这个系统中两离子的纠缠动力学.与Tavis-Cummings模型不同,本文中两离子的纠缠演化经历周期性的消失和恢复.纠缠消失和恢复的周期与系统的初态有关.The model for interaction of two trapped ions in a trap with a laser beam have been studied. By applying unitary transformations, the system can be transformed into the Tavis-Cummings model. With computation of the concurrence, the entanglement dynamics of two trapped ions in this system has been investigated. Unlike that in Tavis - Cummings model, the entanglement of two ions in our model undergoes periodic death and revivals. The periodic of entanglement death and revivals is dependent of the initial state of system.

关 键 词：囚禁离子 纠缠突然消失 共生纠缠度 

分 类 号：O431[机械工程—光学工程]