EFFECT OF MOVING MASS CENTER ON THE FIELD ENTROPY EVOLUTION AND EMISSION-SPECTRUM OF AN ATOM IN AN IDEAL RING CAVITY

The emission spectrum of a two-level atom with moving mass centre inte racting with a single-mode radiation field in a ring cavity and the fi eld entropy evolution has been studied. As a result, the theoretical c urves of the emission spectrum have been given; the features of the em ission spectrum depend not only on the photon statistical distribution of the initial field, such as the coherent field and the Fock state, but also on the bandpass width Gamma of the filter detector and distri bution of mass-centre momentum. The properties of field entropy evolut ion show a damping function of time; it is different from that when th e atom is at rest.