Dynamics of the driven Jaynes-Cummings model

We study the dynamical features of the Jaynes-Cummings model with the atom driven by an external classical field in the case that the cavity held is i nitially in a Fock state. We find the dynamical variables by using dressed states in the bare atom representation. We show that the dynamical behavior of the cavity held call be strongly modified by the external classical fie ld. We also find that the cavity held is super-Poissonian after some intera ction time if the external field is strong enough.