Controlling nonclassical properties of the Jaynes-Cummings model by an external coherent field - art. no. 043809

The dynamics of the driven Jaynes-Cummings model where a two-level atom is coupled to a single mode of cavity fields and is driven by an external cohe rent held is investigated. We find that in this model quantum collapse and revivals of the atomic population inversion and squeezing of the cavity fie ld can be generated from a thermal photon state. We also notice that the sq ueezing is very sensitive to the mean number of thermal photons initially i n the cavity, but the quantum collapse and revivals are not. The influence of the amplitude of the driving field and various detuning parameters on th e nonclassical effects is discussed. The result shows that one can use the external field to control nonclassical effects in the Jaynes-Cummings model .