变频率光场与二能级原子的相互作用:双光子过程  

The interactions of a two-level atom with a coherent field of time-varying frequency:the two-photon transition

作　　者：李征鸿[1] 于明章[1] 羊亚平[1] 

机构地区：[1]同济大学物理系,上海200092

出　　处：《物理学报》2008年第3期1693-1698,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10674103);新世纪人才基金(批准号:NCEF060384)资助的课题~~

摘　　要：研究了二能级原子与单模电磁场相互作用时的双光子过程,主要考虑了在相干态初始条件下场频率发生变化时的情况,讨论了场频率随时间作正弦缓慢变化对原子布居数反转、光场压缩与原子压缩等特性的影响.结果显示,场频率的改变将使得原子布居数反转的崩塌回复周期增大,回复值减小,而光场及原子压缩效应减弱.The two-photon transition for a two-level atom interacting with a single-mold electromagnetic field has been investigated. The initial coherent states with time-varying frequency are considered. The effects of the frequency modulation in sinusoidal form on the atomic population inversion and the squeezing properties of the atom and field are studied. The frequency change can lead the collapse-revival period of population inversion to increase, the maximum value of the revival to decrease, and the squeezing effects of the field and atom are weakened.

关 键 词：布居数反转 光场压缩 原子压缩 双光子过程 变频率光场 二能级原子 

分 类 号：O431.2[机械工程—光学工程]