In this paper, the nonclassical properties of two two-level atoms interacting with a single mode light field is studied by means of the quantum theory without rotating wave approximation; the influences of the yirtual photon process on the mean photon number, the degree of second order coherence of field, the evolution of the field entropy and the squeezing effect are also discussed 本文利用全量子理論,研究了非旋波近似下“耦合雙原子-單模光場(chǎng)”相互作用過(guò)程中光場(chǎng)所表現(xiàn)出的非經(jīng)典性質(zhì),研究了虛光子過(guò)程對(duì)場(chǎng)的平均光子數(shù)、二階相干度、場(chǎng)熵演化特性及光場(chǎng)壓縮效應(yīng)的影響。