COHERENT POPULATION TRAPPING IN THE SYSTEM OF A \varLambda-CONFIGURATION MULTILEVEL ATOM DRIVEN BY A TWO-MODE QUANTIZED FIELD

We have studied the atomic coherent population trapping in the system of a two-mode quantized field interacting with a \varLambda-configuration multilevel atom with one lower discrete state mad two sets of quasicontinuum states, or a set of quasicontinuum states and a set of true continuum states. The influence of the atom's initial preparation and the properties of the atomic upper levels on whether or not atomic coherent population trapping occurs, and the states of the field which trap the atom are analyzed.