两维耦合腔系统中的纠缠特性  

Entanglement Characteristics in Two-Dimensional Coupled Cavity Systems

作　　者：邱昌东[1] 卢道明[1] 

机构地区：[1]武夷学院机电工程学院,福建武夷山354300

出　　处：《光学学报》2016年第5期250-256,共7页Acta Optica Sinica

基　　金：福建省自然科学基金(2015J01020)

摘　　要：研究四个二能级原子与两维耦合腔的相互作用系统,其中每个腔囚禁一个二能级原子,并且原子通过单光子跃迁与腔场发生共振相互作用。利用负本征值度量两子系统间的纠缠,讨论了腔与腔之间的耦合系数变化对原子与原子之间和腔与腔之间纠缠的影响。研究结果表明,随腔与腔之间耦合系数的增大,原子与原子之间纠缠增强,腔与腔之间纠缠减弱。The interaction system of four identical two-level atoms and two-dimensional coupled single-mode optical cavities is studied in which the atoms are trapped separately in the cavities,and each atom resonantly interacts with the cavity via a one-photon hopping.Negativity is used to quantify the degree of entanglement between two subsystems.The influences of cavity-cavity coupling coefficients on the atom-atom entanglement and the cavitycavity entanglement are discussed based on the numerical calculation results.The obtained results show that the atom-atom entanglement is strengthened while the cavity-cavity entanglement is weakened with the increase of cavity-cavity coupling coefficient.

关 键 词：量子光学 两维耦合腔 二能级原子 量子纠缠 

分 类 号：O431.2[机械工程—光学工程]