Kerr效应对原子与双模场Raman相互作用模型腔场谱的影响

Cavity field spectrum of an atom interacting with two-mode field through raman process in Kerr medium

研究了含Kerr介质高Q腔中单个二能级原子与双模量子化光场发生Raman耦合过程的腔场谱，给出原子初态处于基态而初始光场为数态时的数值结果．发现在一般情况下，两模腔场谱均为双峰结构,Kerr效应对真空场谱结构无影响．在弱场条件下，Kerr效应的增强会导致备模高频峰明显增高，而低频峰明显降低；在强场条件下，各峰峰位都随着Kerr效应增强明显右移，谱结构整体偏离原共振频率.

The cavity field spectrum of an atom interacting with two-mode field through Raman process in an additional Kerr medium is studied. The results for the initial fields in pure number state and the atom in ground state are presented. It is found that two-peak structure appears for each mode spectrum. The Kerr effect dos not influence the spectra structures for a vacuum field initially. Under the condition of weak initial fields, the high frequency peak of each mode becomes taller and the other peak becomes lower along with the accretion of Kerr effect. Under the condition of strong initial fields, all peaks are far away from the resonance frequency obviously due to the increase of the Kerr effect.