研究了双光子过程原子与耦合腔相互作用系统，给出了系统总激发数等于2时态矢的演化。采用负本征值来描述两个子系统间的纠缠，利用数值计算方法研究了系统中原子与原子间、腔场与腔场间和原子与腔场间的纠缠特性。讨论了腔场间的耦合强度变化对纠缠特性的影响。研究结果表明：随着腔场间耦合的增强，两原子间的纠缠增强，但原子与腔场间和两腔场间的纠缠却减弱。

Two identical cavities, each containing one two-level atom, coupled via a two-photon hopping interaction are considered. The evolution of the state vector of the system is given. Negativity is used to quantify the degree of entanglement. By means of numerical calculations, the temporal evolution in the entanglement between atoms, between cavities, as well as between the atom and the local cavity mode are investigated. The influence of cavity-cavity coupling coefficient on the entanglement is also discussed. The results show that the entanglement between atoms is strengthened, and that between cavities and that between the atom and the local cavity mode are weakened with the increase of cavity-cavity coupling coefficient.