Coulomb Quantum Kinetics in a Dense Electron—Hole Plasma

The quantum kinetics for Coulomb interactions is derived. It is shown that the screened scattering potential depends on two time arguments, because screening is built up only after the carriers have been excited and begin to rearrange. The nonequilibrium screened Coulomb potential obeys an integral equation with a polarization due to carrier-carrier scattering. By a generalization of the equilibrium theory, a time-dependent plasmon-pole approximation is derived in order to illustrate the physical content of the complex formalism.