Memory Effects in Quantum Theory of Relaxation
We present an approach to theory of relaxation processes with memory in which the time evolution of one-particle distribution functions is coupled with the evolution of many-particle correlations associated with energy balance. The basic idea is to treat the mean interaction energy as an independent state variable in addition to one-particle distribution functions. The method is illustrated by two examples: relaxation in a system with weak pairwise interaction and relaxation in a two-band laser-excited semiconductor.
B.M. Darinskii and L.B. Magalas
V.G. Morozov and G. Roepke, "Memory Effects in Quantum Theory of Relaxation", Solid State Phenomena, Vol. 115, pp. 255-260, 2006