两个耦合二能级原子与压缩相干态光场相互作用系统中光场的相位特性

Phase properties in the model of two coupling two-level atoms interacting with squeezed coherent light-field

应用Pegg-Barnett相位理论,研究了两个耦合二能级原子与压缩相干态光场相互作用系统中光场的相位特性,着重分析了光场的相位概率分布及相位涨落,并讨论了光场相干振幅分量和压缩参量以及原子间耦合系数对场的相位性质的影响。结果表明:光场相位概率分布呈现出三峰高斯分布,在零相位附近概率分布最大,且涨落较小,而其它范围内概率分布小且易振荡。同时由于光场压缩效应的影响使相位概率分布呈现出与相干态光场所不同的情况。

The phase properties in the system of the coupling two-level atoms interacting with squeezed coherent-state light-field is studied from the point of the Pegg-Barnett phase theory. The phase probability distribution and the phase fluctuation are investigated. Meanwhile, the influence of the field amplitude, the compressed parameter, and the coupling coefficient between atoms on the phase properties is also discussed. The results show that the phase probability distribution presents three-peak Gaussian configuration. The maximum of the phase probability distribution lies at the point of the zero phase arid the phase fluctuation is small, while at other place the value of the phase probability distribution is relatively small and vibrates easily. At the same time, because of the influence of light-field squeezing effect, the phase probability distribution is different from that of coherent-state field.