Transient resonant light scattering under random perturbations

A theory of light scattering for transient phenomena is formulated; a general scattering formula is obtained for pulse excitations. For a general stochastic model of random perturbations on a matter system, the formula is exactly expressed in terms of continued fractions. A detailed analysis is given for time-resolved spectra. It is explicitly shown that a change from “scattering” to luminescence can be observed separately as a function of time.