相位损耗腔中光场的相位分布特性  

The Properties of Phase Distribution of the Field in a Phase Damping Cavity

作　　者：刘宝平[1] 于坤[2] 

机构地区：[1]朔州职业技术学院,山西朔州036002 [2]兴义民族师范学院,贵州兴义562400

出　　处：《兴义民族师范学院学报》2013年第1期107-109,共3页Journal of Minzu Normal University of Xingyi

摘　　要：利用Pegg-Barnett相位理论,研究了相位损耗腔中两个型原子与光场在大失谐相互作用下光场的相位分布概率。并讨论了不同平均光子数以及腔的不同衰减系数对光场相位分布的影响。结果表明:当腔无损耗时,光场的相位分布呈现周期性振荡;当腔场存在损耗时,其做减幅周期振荡最终达稳定值。而且腔的衰减系数越大,光场相位变为随机分布所需时间越短。光场的平均光子数越大,相位分布越集中。In virtue of the Pegg-Barnett phase theory, the phase distribution property of photon field is investigated for a system of two -type atoms interacting with field in a phase damping cavity, under large detuning. The effect of different initial field states, the mean photon number and the different damping coefficient on the phase distribution is discussed. The results show that in the absence of dissipation of the cavity, the phase distribution oscillates periodically. When the phase damping exists, it will cause the amplitude suppression of the phase distribution and the probability of the distribution will arrive at a stable value after some time. Furthermore the larger the damping coefficient is, the less time it takes for the phase to change into a random distribution. And the larger the average photon number is, the more concentrated the phase distribution become.

关 键 词：相位损耗腔 型三能级原子 相干光场 Pegg—Barnett相位 

分 类 号：O431[机械工程—光学工程]