高Q腔中Stark效应对两原子纠缠的影响  

Influence of Stark effect on entanglement of two-atom inside a high-Q cavity

作　　者：邢晋晶[1] 王中结[1] 张侃[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《量子电子学报》2009年第3期313-319,共7页Chinese Journal of Quantum Electronics

基　　金：安徽省教育厅自然科学基金(KJ2008A029)项目资助

摘　　要：利用共生纠缠度标准,研究了存在Stark效应的情况下,两个纠缠二能级原子与相干光场相互作用的纠缠动力学。分析了Stark效应耦合系数对系统纠缠动力学的影响。结果表明:Stark效应的耦合系数对两原子间纠缠度的时间演化特性有着很大影响。当Stark效应耦合系数很小时,两个原子间纠缠度的时间演化特性呈现周期性纠缠和退纠缠现象;当Stark效应耦合系数很大时,原子间退纠缠现象消失,即原子始终保持在纠缠状态。The entanglenment dynamics of two entangled two-level atoms interacting with a coherent light field is investigated by means of the standard of entanglement concurrence. The influences of the coupling coefficient of Stark effect on the entanglement dynamics of the system are discussed. The calculating results show that the time evolution of two-atom entanglement is .influenced by the coupling coefficient of Stark effect. The time evolution of two-atom entanglement displays periodic entanglement and disentanglement when the coupling coefficient of Stark effect is much smaller, while the disentanglement will disappear when the coupling coefficient of Stark effect is much larger. That is to say, the statement of entanglement can be preserved preferably

关 键 词：量子光学 纠缠动力学 相干光场 共生纠缠度 STARK效应 

分 类 号：O431.2[机械工程—光学工程]