类Kerr介质中两能级原子与驱动场作用时的相干性

Coherence Properties of a Two-level Atom with a Kerr-like Medium Through an External Controllable Driving Field

两能级原子被嵌制在一充满类Kerr介质的热库中 ,通过求解原子与外加驱动场相互作用时约化密度算符非对角元 ,研究简并双光子过程中原子在外界环境 (类Kerr介质和热库 )下的相干特性 结果表明 :当原子的相干性被保持时 ,外加驱动场的时间演化与原子的跃迁频率。

The coherence of two level atom being put in a thermal reservoir with a Kerr like medium is investigated. The time evolution properties of non opposite angle element of two level atom′s reducible density rectangular array is obtained. Coherence properties of two level atom is studied in degenerate two photon processes when the two level atom interacts with an driving field in the external environment. When two level atom′s coherence is maintained, the theoretical result demonstrates that time evolution of an external driving field is closely related to atomic jump frequency, atom polar rectangularity and the average of modul photon number etc.