Kerr介质中耦合双原子与双模压缩真空场相互作用系统的光子统计性质  

Statistic properties of photon in the system of two coupling atoms interacting with two-mode squeezed vacuum field in Kerr medium

作　　者：方家元[1] 黄春佳[1] 黄祖洪[1] 周明[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：《物理学报》2004年第4期1081-1087,共7页Acta Physica Sinica

基　　金：湖南省教育厅科研计划项目(批准号:01104001 0 1 2 8)资助的课题~~

摘　　要：研究了存在Kerr介质时 ,双模压缩真空场与耦合二能级原子相互作用系统中光子的统计性质 ,讨论了Kerr介质与光场的耦合强度、光场的初始压缩因子和原子的初态对光子统计性质的影响 .数值计算结果表明 ,光子周期性地交替呈现聚束和反聚束效应 ,光场两模之间总是呈现正相关 ,并且这种相关为非经典相关 ;Kerr介质的影响使光场的二阶相干度演化曲线呈现周期性的崩塌 回复现象 ,随着Kerr效应的加强 ,崩塌 回复周期变短 。The statistic properties of photons in the system of two-mode squeezing vacu um field interacting with two coupling atoms in Kerr medium are studied by means of quantum theory.The influences of coupling constant χ, initial squeezed parameter r and the atomic initial state are discussed. The results obtaine d by means of numerical method show that the photon bunching and anti-bunching appear alternately, and the correlation of the two modes of light is both positi ve and non-classical. The periodical collapse -revival phenomenon of the ti me e volution of the second-order coherence degree of the two-mode field appears du e to the influence of the Kerr effect. The periods of the collapse-revival bec ome short up to disappearance with increasing Kerr effect.

关 键 词：KERR介质 耦合双原子 双模压缩真空场 光子统计性质 耦合强度 反聚束效应 

分 类 号：O562[理学—原子与分子物理]