Phenomenological-operator approach to introduce damping effects on radiation field states

Abstract

In this paper we propose an approach to deal with radiation field states which incorporates damping effects at zero temperature. By using some well known results on dissipation of a cavity-field state, obtained by standard ab initio methods, it was possible to infer, through a phenomenological way, the explicit form for the evolution of the state vector for the whole system: the cavity field plus reservoir. This proposal turns out to be extremely convenient for accounting for the influence of the reservoir over the cavity field. To illustrate the universal applicability of our approach we consider the attenuation effects on cavity-field states engineering. The main concern of the present phenomenological approach consists in furnishing a straightforward technique to estimate the fidelity resulting from processes in cavity QED phenomena. A proposal to maximize the fidelity of the process is presented.