超Jaynes-Cummings模型中的原子置于热辐射场时的相干特性

Coherence properties of a two-level atom of the super Jaynes-Cummings model in thermal radiation field

超Jaynes-Cummings模型中的两能级原子置于热辐射场。通过求解原子与热辐射场相互作用过程中原子约化密度算符非对角元 ,精确得出子原子相干性的衰变规律。研究了在相互作用系统中外加驱动场时可保持原子的相干性 ,此时外加驱动场的时间演化与原子的跃迁频率、原子偶极矩。

A two-level atom of the super Jaynes-Cummings model is put in thermal radiation field.The non-opposite angle element of two-level atom's reducible density rectangular array is obtained accurately.Coherence properties of two-level atom is studied when the two-level atom interacts with an driving field in thermal radiation field.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,thermal reservoir's temperature and k-modul photon frequency etc.