双光子过程耦合腔系统中光场的量子特性

Quantum Properties of the Field in the System of Atoms Interacting with Coupled Cavities Via a Two-photon Hopping Interaction

本文研究了双光子过程原子与耦合腔相互作用系统中腔场的压缩效应和反聚束效应.考虑系统总激发数等于2的情况,利用数值计算方法讨论了腔场间的耦合强度变化和原子与腔场间耦合强度变化对反聚束效应的影响.研究结果表明:腔场不呈现出压缩效应;腔场的反聚束效应与原子与腔场的耦合系数之间,以及与腔场间的耦合系数之间都存在着非线性关系.

Two coupled cavities each containing one two-level atom are considered,which interacts with cavity via a two-photon hopping.The evolution of the state vector of the system is given when the total excitation number equals two.The squeezing of field is investigated.By means of the numerical calculations,the influences of cavity-cavity coupling constant and atom-cavity coupling constant on the antibunching effect of field are discussed.The obtained results show that the field does not display squeezing,and the antibunching effect of field has a nonlinear relation with cavity-cavity coupling constant or atom-cavity coupling constant.