Atom dynamical dissipation in the laser cavity with quasimode

In this paper we study the atom dissipation effect in a laser cavity. The cavity field mode is described by the Fox-Li quasimode due to the leaky of cavity. Our results show that the atom decay rate versus the decay rate of the quasimode is a Lorentz type. Effects of the atom-cavity detuning as well as cavity size are also discussed.