  Within the framework of exact quantum electrodynamics in dispersing and
absorbing media, we have studied the emission from an initially in the upper
state prepared emitter in a high quality cavity in the case, when there are two
cavity modes that resonantly interact with the emitter. In particular, when one
of the modes is in resonance with the emitter transition and the other mode is
tuned to the frequency equal to the Rabi splitting of the first mode, the
effect of Rabi resonance is observed.
