Modified quantum kinetic equations for the superradiance in two-and three-level macroscopic systems that interact with electromagnetic fields are derived based on the method for elimination of the boson variables. It is demonstrated that the theoretical predictions are in good agreement with the experimental data.
The chain of kinetic equations for a three-level extended macroscopic system interacting with an electromagnetic field is obtained on the basis of the method of elimination of the boson variables taking into account the coherent pumping processes. On its basis the conventional superradiance of the system is examined in the markovian limit. The relations between the parameters of the superradiant pulse and those of the pumping pulse of arbitrary duration are obtained. The possibility of description of the triggering superradiance is discussed.