Dynamical Casimir-Polder Force Between An Atom And Coundcting Wall In The Single Mode Laser Cavity With Quasimode

In this paper we use a generalized processing perturbative method to calculate the Casimir-Polder force between an atom and conducting wall in a laser cavity. We discuss the Casimir effet by use of quasimodes theory and show that the dynamical Casimir-Polder force oscillates around fix value. And the amplitude attenuate with time evolutions. This is a physically understandable conclusion which indicate the dissipation of the laser cavity. The points in the paper will provide a new method to the investigation of the Casimir-Polder force and related calculations under the consideration of dissipation.