相位耗散腔QED系统中三体纠缠动力学的研究  

Study on the dynamics of three-partite entanglement in cavity QED system with phase dissipation

作　　者：贺启亮[1] 

机构地区：[1]贵州师范大学物理与电子科学学院,贵州贵阳550001

出　　处：《贵州师范大学学报（自然科学版）》2013年第4期54-59,共6页Journal of Guizhou Normal University：Natural Sciences

基　　金：贵州师范大学博士科研启动基金"噪音环境下量子关联的动力学性质及保护问题的研究"(11904-05032130014)

摘　　要：利用加入非线性克尔介质的相位耗散腔QED系统,计算了系统的两体和三体量子纠缠,研究了非线性克尔介质对两体和三体纠缠动力学的影响。研究结果表明当非线性克尔系数χ和偶极偶极相互作用强度Ω取合适数值时,两原子间的稳态量子纠缠可以得到提高。另外,利用制备态保真度的方法对系统中的三体纠缠也进行了研究,发现随着时间的演化,真正的三体纠缠是可以在系统中出现的,特别,可以通过调整克尔系数χ和偶极偶极相互作用强度Ω来调节系统中三体纠缠出现的时间。The entanglement dynamics of Tavis-Cummings model with an added nonlinear kerr-like me- dium in the presence of phase decoherence has been investigated. It is found that the amount of sta- tionary entanglement between two atoms can be increased if the appropriate values of kerr coefficientX and dipole-dipole interaction/2 have been chosen. Furthermore, the three-partite entanglement of the system is also analyzed by making use of the state preparation fidelity. It is shown that the genuine three-partite entanglement may appear in this system during the time evolution. Particularly, the time in which the three-partite entanglement appears can be tuned by adjusting the values of kerr oefficient X and dipole-dipole interaction ~.

关 键 词：稳态纠缠 克尔介质 三体纠缠 相位耗散 

分 类 号：O413.2[理学—理论物理]