对相干态光场中非简并双光子Jaynes-Cummings模型的辐射谱和腔场谱  

Atomic Emission and Cavity Field Spectra for a Nondegenerate Two-Photon Jaynes-Cummings Model in the Presence of Pair-Coherent States

作　　者：李悦科[1] 张桂明[1] 高云峰[1] 

机构地区：[1]聊城大学传媒技术学院,山东聊城252059

出　　处：《光学学报》2011年第5期239-243,共5页Acta Optica Sinica

基　　金：国家自然科学基金(10574060);山东省自然科学基金(ZR2009AM019);聊城大学自然科学研究基金(X09047)资助课题

摘　　要：研究了二能级原子在高Q腔中与对相干态光场发生非简并双光子相互作用过程的辐射谱和腔场谱。给出了弱初始场条件下辐射谱和腔场谱的数值计算结果,讨论了对相干态光谱结构的量子特性。研究结果表明,高Q腔内对相干态光场的平均光子数和两模光场平均光子数之差对辐射谱的峰位和腔场谱的峰高影响较显著,而对辐射谱的峰高和腔场谱的峰位影响不明显。固定两模平均光子数差,原子辐射谱可以在强初始场条件下出现"拉比劈裂",这对于实验中测量拉比频率以及测量原子与腔场的相互作用强度具有重要价值。两模平均光子数差的改变可以调制腔场谱结构。The atomic emission and cavity field spectrum of an atom interacting with two-mode fields in the pair-coherent states are investigated.The results for weak initial fields are presented.The spectral structure is discussed.It is found that the peak position of the atomic emission spectrum and the height of the cavity-field spectrum are both affected by the average photon number and the photon-number difference between the two modes sensitively.The effect of the two field intensity on the peak position of the cavity field spectrum and the height of the atomic emission spectrum are both not obvious.Fixing the photon difference of the two fields,the Rabi splitting will arise in atomic emission spectra with strong initial fields.This is useful in experiment for measurement of the Rabi frequency and the atom-field coupling constant.The cavity-field spectrum structure can be modulated by the photon-number difference of the two fields.

关 键 词：量子光学 原子辐射谱 腔场谱 JAYNES-CUMMINGS模型 对相干态 

分 类 号：O431.2[机械工程—光学工程]