T型结构腔-光纤系统中的几何量子失谐  

Geometrical Quantum Discord in T-Shaped Cavity-Fiber System

作　　者：吴道永[1] 卢道明 Wu Daoyong;Lu Daoming(Laboratory Management Center,Wuyi University,Wuyishan,Fujian 354300,China;College of Mechanic and Electronic Engineering,Wuyi University,Wuyishan,Fujian 354300,China)

机构地区：[1]武夷学院实验室管理中心,福建武夷山354300 [2]武夷学院机电工程学院,福建武夷山354300

出　　处：《激光与光电子学进展》2018年第7期435-442,共8页Laser & Optoelectronics Progress

基　　金：福建省自然科学基金(2015J01020)

摘　　要：考虑了每个腔囚禁一个二能级原子,腔与腔之间通过光纤连接,且原子与腔发生共振相互作用的情况,利用几何量子失谐(GQD)研究了两子系统间的量子关联,分析了T型结构耦合腔系统中两原子间和两腔间的GQD。采用数值计算方法,讨论了原子与腔场以及腔与光纤间的耦合强度对GQD的影响。研究结果表明,随着原子与腔间的耦合系数的增大,原子间的GQD减弱,但腔间的GQD增强;随着光纤与腔间的耦合强度的增大,原子间的GQD增强,腔间的GQD却减弱。The situation that a two-level atom is trapped in each cavity,the two cavities are connected via a fiber,and each atom resonantly interacts with cavity is considered.Geometrical quantum discord（GQD）is used to quantify the degree of correlation between two subsystems,and the GQDs between two atoms and between two cavities in T-shaped coupling cavity system are analyzed.The influences of the atom-cavity and fiber-cavity coupling intensities on GQD are discussed by using the numerical calculation method.The research results show that,with the increase of the atom-cavity coupling coefficient,the GQD between atoms is weakened,but the GQD between cavities is strengthened. With the increase of fiber-cavity coupling coefficient,the GQD between atoms is strengthened,but the GQD between cavities is weakened.

关 键 词：量子光学 T型结构耦合腔 光纤 几何量子失谐 

分 类 号：O431.2[机械工程—光学工程]