非简并Raman耦合模型的改进型有效哈密顿量

Modified Effective Hamiltonian for the Nondegenerate Raman-Coupled Model

本文研究了一个A一型三能级原子与双模量子腔场的相互作用。在原子—场失谐量较大的条件下,把这个模型化为非简并Raman耦合模型提出了非简并Raman耦合模型的改进型有效哈密顿量,给出了其适用条件。分析表明,在研究Raman耦合模型时,通常的有效哈密顿量是不合适的,必须计及原子能级(起码能级之一)的交流Srark移动的影响。

We derive a modified effective Hamiltonian for the nondegenerate Raman - coupled model from the interaction of a A-type three -level atom with a two-mode quantum cavity field under the large - detuning condition. The result shows that the normal effective Hamiltonian is not suitable for the study and one must consider the ac Stark shift of the atomic levels (at least one of the levels).