双模相干态和压缩真空态光场非等同两原子体系的腔场谱

Cavity Field Spectra of Two Atoms Interacting with Two-mode Field in Superposition States

研究了两个非等同二能级原子与双模腔场相互作用过程的腔场谱.导出了双模初始光场处于任意量子态时腔场谱的计算公式,给出了光场处于相干态和压缩真空态时的数值结果,讨论了相对耦合常数R=g2/g1和初始场强对腔场谱的影响.发现相干态光场的腔场谱在R很小时为双峰,在R接近于1时为3峰.压缩真空态的腔场谱在弱场条件下表现为复杂的多峰结构,在强场条件下则只有单一经典共振峰或裂距很小的双峰.

The cavity field spectra of two atoms interacting with two-mode field with different coupling constant via two-photon resonant transition processes are investigated. The results for the initial fields in coherent state or squeezed vacuum state are presented. The effects of relative coupling constant R=g2/g1 and initial field intensity on the spectrum structure are discussed. When the two modes are both in coherent states, the each mode spectrum appears two peeks for small R and three peeks for R=1. When the two modes are both in squeezed vacuum states, the complicated multi-peak structure appears for weak fields and single classical resonance peak appears for strong field.