Quantum theory of non-Markovian processes

Summary form only given. One can retrieve the Boltzmann kinetics for the long-time asymptote with a broadened energy conserving delta function. We calculate the spectral functions self-consistently with the quantum kinetic equation under the influence of the mean Hartree-Fock fields of Coulomb interaction and of the interaction with the electric field of coherent femtosecond light pulses. This formulation applied to a semiconductor with LO-phonon scattering was able to explain the phonon-related oscillations superimposed on the decaying interband polarization.