量子光场主要存在三种非经典效应：光子反聚束、亚泊松分布和压缩效应。
There are three main non-classical features for quantum field, i. e. photon anti-bunching effect, sub-Poissonian statistics distribution, and squeezing effects.
本文采用数值计算方法研究了强相干初态光场与级联型三能级原子相互作用中的光子聚束与反聚束效应。
The evolution of the field entropy of the interaction between three level cascade atom and field in a Kerr medium has been studied.
同时发现通过对原子的选择性测量，场的压缩特性和光子的反聚束效应会增强。
Meanwhile it is shown that squeezing of field and photon antibunching can be greatly enhanced via selective atomic measurements.
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