两耦合原子与双模二项式光场相互作用系统的腔场谱

研究了高Q腔中具有偶极相互作用的两个等同二能级原子与双模二项式光场相互作用过程的腔场谱,重点研究了两模腔场谱的干涉效应对谱结构的影响。结果表明:两模光场平均场强相等时,每模腔场谱一般出现对称多峰结构。随着初始场强的增加中间3峰趋于iω和ωi±0.7g处,而边峰消失。当两模初始场的频率差Δ大于6g(g为原子与腔场的耦合常量)时,两模间的干涉效应可以忽略;在Δ小于6g时,模间的干涉效应对腔场谱结构有明显的影响;尤其当Δ从1.4g逐渐减少时,模Ⅰ和模Ⅱ的三个主峰开始逐渐重叠,两模腔场谱之间出现了十分明显的干涉现象。

Cavity-Field Spectra of Two Coupled Atoms interacting with Two-Mode Radiation Field in Binomial State

The cavity-field spectra of a pair coupled two-level atoms in an ideal cavity interacting with two-mode radiation field is studied with the fields both in the binomial state. The influence of the interference effect on the spectra structure is discussed in detail. The result shows that multi-peak structure appears in the cavity-field spectra when the photon number of the two-mode radiation field is equal, the three peaks of each mode spectrum approach ωi and ωi±0.7g and side peaks disappear while the fields' intensity becomes more and more stronger. It's found that when the frequency difference of the initial two mode Δ is larger than 6g (g is the coupling coefficient between the atom and the field) the interference effect of the spectra can be ignored, when Δ is smaller than 6g the interference effect should be considered. Especially when Δ is reduced gradually from 1.4g the three peaks of the mode Ⅰ and mode Ⅱ begin superpositioning, the interference effect is obvious.