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本文采用生成函数方法由光场密度算符主方程求得了光场压缩度s、二阶相干度g和光子统计分布的严格解析表达式,论证了它们随标度时间τ的演化。计算表明,在双光子吸收过程中,s逐渐减弱,但在相当长的时间内光场仍然呈现压缩特性。该过程有利于呈现和增强光子反聚束效应和光子亚泊松
In this paper, a strict analytical expression of the squeezing degree s, second-order coherence g and photon statistical distribution of light field is derived from the master equation of the light field density operator using the generative function method. The evolution of τ with the scaling time is demonstrated. Calculations show that s gradually decreases during the two-photon absorption process, but the light field still exhibits compressive properties for a long time. This process is conducive to presenting and enhancing photon anti-bunching effect and photon sub-Poisson