On the master equation approach of vibrational relaxation in condensed media

The purpose of this paper has been to examine the validity and limitations of the Pauli master equation and to demonstrate the use of the master equation approach in describing the vibrational relaxation in the condensed phase. The master equations for vibrational relaxation of a number of model systems have been derived. The calculation of rate constants of vibrational relaxation has been discussed. The solution of the master equations of multimode relaxation at low temperatures has been presented. The Brownian motion of an oscillator linearly coupled with the medium has been investigated and a model of the coupling between the vibrational relaxation and other unimolecular processes (like electronic relaxation, etc.) has been developed.