奇偶纠缠相干态光场驱动下Λ-型三能级原子的辐射谱

Emission spectrum of a Λ-type three-level atom with two-mode odd-even entangled coherent states cavity fields

采用时间演化算符方法,研究Λ-型三能级原子与奇偶纠缠相干态光场共振相互作用的辐射谱.给出了辐射谱一般公式.结果表明:不论下能级简并与否,奇偶纠缠相干态光场平均光子数很小时均出现拉比分裂,且下能级简并时,强度随奇偶纠缠相干态光场纠缠程度的增加而增加;两下能级非简并时,一模场驱动的辐射谱峰高随纠缠程度的增加而增加,而另一模场驱动的辐射谱峰高随纠缠程度的增加而减小.一般辐射谱呈对称的10蜂结构.

By means of time - evolution operator, we have studied the emission spectrum of a Λ - type three - level atom interacted resonantly with two - mode odd - even entangled coherent states cavity fields in the paper. The physical spectrum expression of radiation emitted by the atom was given. The results indicated that whether two lower levels are degeneracy or not, the emission spectra of Λ - type three - level atom occur Rabi splitting when average photon number of two - mode odd - even entangled coherent states cavity fields were very small. And intensity increased with degree of two -mode entangled coherent states cavity fields when two lower levels were degeneracy. Intensity increase with degree of one - mode entangled coherent states cavity fields and that intensity decreased with degree of another one - mode entangled coherent states cavity fields when two lower levels were degeneracy. The structure of the resonant emission spectra of the atomic system had ten peaks generally.