单原子激光光场的相干性和光子统计分布  

Quantum Statistic and Coherent Properties of One Atom Laser in Cavity

作　　者：刘海镇[1] 吕树臣[1] 张莹[1] 

机构地区：[1]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2011年第5期38-41,共4页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省教育厅科学技术研究重点项目(12511z013)

摘　　要：采用量子主方程方法来研究一个二能级原子与单模腔耦合的耗散系统的平均光子数与二阶量子相干度随时间的演化行为.结果表明在好腔和坏腔条件下,两腔的腔场的光子二阶量子相干度都受到原子所受真空阻尼率γ变化的明显影响.不同的是,在坏腔条件下,光子的统计分布在受真空阻尼率γ的影响时表现的并不明显,而在好腔的条件下将会变得比较明显.In this paper, the quantum master equation approach is employed to study the quantum statistics and the coherent nature of a dissipative system with a two - level atom coupled to a single - mode cavity by calculating the time evolution of the photon number distribution and second order coherence. Our results show that the good cavity and bad - cavity conditions, second - order coherence with the change of atomic suffered significant effect of the vacuum damping rate changes. Difference is that in the bad cavity conditions, the photon statistical distribution in the vacuum damping rate performance is not obvious , In the good cavity conditions will become more obvious.

关 键 词：量子主方程 光子数分布 二阶相关度 亚泊松分布 反群聚性 

分 类 号：O431[机械工程—光学工程]