单模强光场中的非线性二能级原子模型

目的修正传统JC(Jaynes-Cummings)模型中省略的A2项对原子模型的影响,得到强光场中比较精确和实用的量子光学模型。方法利用二次量子化的方法,严格推导了A2项对原子模型的影响。结果得到了一种简单的非线性量子光学模型,该模型可用于在强光场中原子行为的研究。最后给出了这个模型的场为相干态时的一个解,并对解进行了分析。结论在强光场中A2项对系统行为有较大的影响,该模型则在强光场中给出了一个比较精确的结果。

Nonlinear two-level atomic model in high intensity one-mode light field

Aim To modify the traditional JC(Jaynes-Cummings) model by considering the influence of the term A2, and a more rigorous and practical quantum optics model was obtained.Methods The model including the term A2 is rigorously derived by using second-quantization method. Results A nonlinear quantum optics model for a two-level atom interacting with light field is given. This model can be used to study the atomic behavior in the intense light field. Finally, a simple solution of this model under the condition that the two-photon process is neglected is obtained, and the difference of this solution with that of the JC model is also simply discussed.Conclusion The term of A2 is greatly modify the form of the JC model and the model presented here can provide a relative precise results if the light field is strong.