title: From coherently excited highly correlated states to incoherent relaxation processes in semiconductors.
abstract: Recent theories of highly excited semiconductors are based on two formalisms, referring to complementary experimental conditions, the real-time nonequilibrium Green's function techniques and the coherently controlled truncation of the many-particle problem. We present a novel many-particle theory containing both of these methods as limiting cases. As a first example of its application, we investigate four-particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one-particle distribution functions. Our results are the first rigorous solution concerning formation and decay of four-particle correlations in semiconductors. They are in excellent agreement with experimental data.
authors.affiliation: John von Neumann-Institute for Computing (NIC), Forschungszentrum Jülich, 52425 Jülich, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Schäfer
authors.forename: R
authors.initials: R
authors.lastname: Lövenich
authors.forename: N A
authors.initials: NA
authors.lastname: Fromer
authors.forename: D S
authors.initials: DS
authors.lastname: Chemla