Kerr介质中双模场与三能级原子依赖强度耦合的量子统计  

Quantum statistic of two-mode cavity interacting with the V-type three-level atom via intensity-dependent coupling in Kerr medium

作　　者：李秀凤[1] 周明[1] 靳丽娟[1] 

机构地区：[1]长沙理工大学物理与电子科学系,长沙410077

出　　处：《原子与分子物理学报》2008年第1期189-194,共6页Journal of Atomic and Molecular Physics

基　　金：湖南省教育厅资助的课题(06C096)

摘　　要：研究了Kerr介质中对相干态光场与V型三能级原子依赖强度耦合相互作用的量子统计性质.对Cauchy-Schwartz不等式的研究表明:失谐量不为零(Ω1=Ω2≠0)时两模间的非经典相关程度有所增强,当初始场强ξ一定而两模场光子数差q增大时,场的非经典相关程度加强;q一定而ξ增大时,场的非经典相关程度减弱,Kerr效应使两模场的非经典相关性有所减弱.对二阶相干度的研究表明,第一模总呈现反聚束效应且Kerr效应对其影响相对较小,而第二模则聚束与反聚束效应交替出现,Kerr效应对g(222)的振荡幅度影响与q的大小有关.Quantum statistic properties of pair coherent states interacting with the V-type three-level atom via intensity-dependent coupling in Kerr medium are studied. The results show that when initial strength remains unchanged and photon difference q is increased, the non-classical coherent degree between the two-mode cavities is increased; when q remains unchanged and ξ is increased, the non-classical coherent degree is decreased; when the Kerr effect exist, the non-classical coherent degree is decreased . The results also show that, the second-order coherence degree of the cavity 1 shows g11^（2） 〈 1 the influence of Kerr effect is not evident. but the second -order coherence degree of the cavity 2 shows g22^（2） 〈 1 or g22^（2） 〉 1 alternatively; the amplitude of the g22^（2） change with q due to the Kerr effect.

关 键 词：量子光学 对相干态光场 V型三能级原子 KERR介质 量子统计 

分 类 号：O431.2[机械工程—光学工程]