本文采用时间演化算符方法和数值计算研究了相干光场与混合态二能级原子双光子过程中的光子聚束与反聚束效应，结果表明：量子崩塌与复苏性质和原子初始的混合程度无关，当0.97≤|S|≤1时，辐射光子会周期性地呈现短时的反聚束性质，随着原子初始混合程度的增大，二阶相干函数g⁽²⁾(0)的时间平均值不断增大，辐射光子越来越远离反聚束状态。

In this paper, the bunching and antibunching effects of the photon in the two-hoton process with two-level atomic mixed-state are studied by means ofthe time-volution operator method and numerical calculation. The results show that thequantum collapse and revival properties do not depend on the mixing extent of the atomicinitial state. The antibunching effect of the radiation photons is displayed periodicallyas 0.97≤|S|≤1;with the increasing of the mixing extent of the atomic initial state,the average value of the second-order correlation function g⁽²⁾(0) will become larger,and the characteristics of radiative photons is getting far from antibunching effects.