Kerr介质中双模奇偶纠缠相干光场与V型三能级原子相互作用系统的光子统计性质  

Statistic properties of photon in the system of a two-mode odd-even entangled coherent states field interacting with atom in Kerr medium

作　　者：方曙东[1,2] 曹卓良[1,2] 

机构地区：[1]安徽大学物理与材料科学学院,光电信息获取与控制教育部重点实验室,安徽合肥230039 [2]池州学院物理系

出　　处：《量子电子学报》2007年第5期592-599,共8页Chinese Journal of Quantum Electronics

基　　金：安徽省教育厅重点科研项目资助(2006kj070A)

摘　　要：采用求解Schr(?)dinger方程和数值计算方法,研究了Kerr介质中双模奇偶纠缠相干光场与V型三能级原子相互作用系统的光子统计性质,分析了双模奇偶纠缠相干光场的纠缠度、Kerr介质与光场的耦合强度、双模光的平均光子数、失谐量和原子基态概率幅对光子统计性质的影响。结果表明:双模奇偶纠缠相干光场的纠缠程度对光子统计性质的影响不十分明显;Kerr效应增强使演化曲线上下移动,曲线的振荡频率变大、振荡幅度变小;保持场模1的光子数不变而改变场模2的光子数,会使演化曲线向上或向下显著移动、曲线的振荡幅度发生变化;失谐量的改变对光子统计特性也有一定影响;原子初态中基态概率幅的变化使演化曲线上下显著移动。The statistic properties of photon in the system of a two-mode odd-even entangled coherent states field interacting with a Ⅴ-type three-level atom in Kerr medium are investigated by solving SchrSdinger equation and numerical calculations. The effects on the statistic properties of photon induced by the degree of entanglement of the two-mode odd-even entangled coherent states field, the coupling strength of the Kerr medium with the light field, the mean photon numbers and the ground state probability amplitude of atomic initial state are analyzed. The results indicate that the influence of the degree of entanglement of the two-mode odd-even entangled coherent states fields on the statistic properties of photon isn＇t noticeable. But the enhancing of Kerr effect, the decreasing of mean photon numbers and the increasing of the ground state probability amplitude of atomic initial state cause the time evolution curves to move up or down distinctly. The enhancing of Kerr effect results in the increase of the oscillating frequency of the curve and the decrease of the oscillating amplitude of the curve. When the mean photon numbers of the mode 1 remain unchanged and the mean photon numbers of the mode 2 are decreased, the oscillating amplitude of the curve is increased.

关 键 词：量子光学 光子统计性质 双模奇偶纠缠相干光场 Ⅴ型三能级原子 KERR介质 

分 类 号：O431.2[机械工程—光学工程]