We discuss quantum interference effects in pumped three-level ladder-type artificial
atomic systems interacting also with microcavities. The required features (i.e., energy levels,
dipoles, etc.) can be engineered is such systems. Particularly, we show that quantum
interference occurs when both transitions are pumped and the cavity is tuned to one of the
external sidebands [1]. In this case, we identify two indistinguishable amplitudes of the atomfield
interaction that interfere destructively and, therefore, may lead to the complete
cancelation of the cavity field. More precisely, we show that the artificial atom is completely
decoupled from the cavity. So that, although it is being pumped, it does not emit any photons
in the cavity and the cavity field is described only by its interaction with the thermal vacuum
[1].