两Jaynes-Cummings原子间的纠缠动力学和转移特性（英文）  

Dynamics and Transfer of Entanglement between Two Jaynes-Cummings Atoms

作　　者：廖庆洪[1] 刘志伟[1] 袁硕[1] 刘欣[1] 张旗[1] 

机构地区：[1]南昌大学电子信息工程系,南昌330030

出　　处：《光子学报》2016年第3期70-77,共8页Acta Photonica Sinica

基　　金：The National Natural Science Foundation of China(Nos.11247213,61368002,11304010,11264030,61168001);the China Postdoctoral Science Foundation(No.2013M531558);the Jiangxi Postdoctoral Research Project(No.2013KY33);the Natural Science Foundation of Jiangxi Province(No.20142BAB217001);the Foundation for Young Scientists of Jiangxi Province(Jinggang Star)(No.20122BCB23002);the Research Foundation of the Education Department of Jiangxi Province(Nos.GJJ13051,GJJ13057)

摘　　要：采用两种不同的纠缠度量方法(并发度和负值度),研究了两Jaynes-Cummings原子之间的纠缠演化以及各子系统之间的纠缠转移,分析了两原子之间初始纠缠度对纠缠的影响.结果表明纠缠的幅值依赖于初始纠缠度,而解纠缠时间长度与初始纠缠度无关.制备了两个腔场之间的最大纠缠态,数值分析显示两原子之间的初始纠缠流入了其它各个子系统,导致演化过程中的纠缠突然死亡和纠缠突然产生现象.Two different measures of entanglement,concurrence and negativity,were used to study the evolution of the two Jaynes-Cummings atoms and the transfer of the entanglement between the subsystems.The effect of the initial entanglement degree of two atoms on the time evolution of entanglement was analyzed.It is found that the amplitude of the entanglement depends on the initial entanglement degree while the length of time interval for the zero entanglement does not.The maximally entangled state between the two cavities was created.Moreover,the numerical analysis shows that the initial entanglement of the two atoms flows into the other subsystems and leads to entanglement sudden death and entanglement sudden birth in the evolution.

关 键 词：量子光学 量子信息 量子纠缠 纠缠突然死亡 纠缠突然产生 并发度 负值度 

分 类 号：O431.2[机械工程—光学工程]