Kerr介质中失谐量对级联三能级原子纠缠演化的影响  

Influence of detuning on entanglement evolution of cascade three-level atom in Kerr medium

作　　者：王建荣[1] 赖云忠[1] 李坤[1] 

机构地区：[1]太原科技大学物理系,山西太原030024

出　　处：《量子电子学报》2011年第4期434-438,共5页Chinese Journal of Quantum Electronics

基　　金：山西省自然科学基金(20031006)资助项目

摘　　要：利用量子理论,采用数值计算的方法对体系纠缠熵进行分析,得出光场相干参量、模间光子数、Kerr介质系数以及失谐量对级联三能级原子纠缠演化的影响。结果显示:纠缠强度随光场强度的增强而逐渐增强,模间光子数的增加可以使纠缠变得稳定。Kerr效应在光子数较多时影响显著。Kerr系数不变时,失谐量的增加会使纠缠强度增强,但这种影响主要体现在相互作用初期。The effects of optical field coherence parameter,modular photon number,Kerr medium coefficient and detuning on the entanglement evolution of cascade three-level atom in Kerr medium are studied based on quantum theory and numerical calculation.The results show that the entanglement between atoms is enhanced in stronger optical field and the entanglement become steady by increasing the modular photon number.Kerr effect is remarkable in more photon number.With invariable Kerr medium,the increase of detuning will strengthen the entanglement strength,but this effect primarily incarnates on initial time of interacting.

关 键 词：量子光学 级联三能级原子 KERR介质 失谐量 量子纠缠 

分 类 号：O431.2[机械工程—光学工程]