耦合腔场中原子共生纠缠对的研究  

The Study on the Atomic Concurrence in the Coupled Cavities

作　　者：崔文凯[1] 张英杰[1,2] 夏云杰[1,2] 

机构地区：[1]曲阜师范大学物理工程学院,山东曲阜273165 [2]山东省激光偏光与信息技术重点实验室,曲阜师范大学物理系,山东曲阜273165

出　　处：《量子光学学报》2012年第4期344-349,共6页Journal of Quantum Optics

基　　金：国家自然科学基金(61178012);山东省自然科学基金(ZR2012FQ024);曲阜师范大学本科生科研训练计划(2011A017)

摘　　要：研究了耦合腔场模型下原子纠缠与光腔场纠缠的演化与转移问题。发现在不同Bell型初态下,光腔场间耦合参数对初始纠缠的演化行为起到了不同的作用。对第一类Bell态cosθ|e,e〉+sinθ|g,g〉,调节腔场间耦合参数既可以起到延长原子纠缠死亡时间的作用,又可以起到保护初始原子纠缠的效果。而对第二类Bell态cosθ|e,g〉+sinθ|g,e〉,腔场耦合参数对原子间初始纠缠只起到保护作用。In this paper, the dynamics evolution and transfer of the atomic concurrence and the cavities concurrence are investigated in the coupled-cavity model. The results show that the coupling coefficient between two cavities plays different roles on evolutional behaviors for the initial entanglement in the different Bell states. In the case of the first Bell state cosθ｜e,e〉＋sinθ｜g,g〉 , the coupling coefficient between two cavities not only can prolong the time of entanglement death, but also can preserve the initial atomic entanglement. While for the case of the other Bell state coefficient between two cavities only can give a protection for the initia cosθ｜e,g〉＋sinθ｜g,e〉, the coupling atomic entanglement.

关 键 词：量子光学 量子纠缠 共生纠缠 纠缠突然死亡 

分 类 号：O431[机械工程—光学工程]