Effects of decoherence on the radiative and squeezing properties in a coherently driven trapped two-level atom

摘要

Analysis of the effects of decoherence on the radiative and squeezingproperties of a coherently driven two-level atom trapped in a resonant cavityapplying the corresponding master equation is presented. The atomic dynamics aswell as the squeezing and statistical properties of the emitted radiation areinvestigated. It is found that the atom stays in the lower energy level moreoften at steady state irrespective of the strength of the coherent radiationand thermal fluctuations entering the cavity. Moreover, a strong externalcoherent radiation results the splitting of the line of the emission spectrum,whereas the decoherence broadens the width and significantly decreases theheight. It is also found that the emitted radiation exhibits photonanti-bunching, super-Poissonian photon statistics and squeezing, despite thepresence of the decoherence which is expected to destroy the quantum features.