title: Theory of antibound states in partially filled narrow band systems.
abstract: We present a theory of the dynamical two-particle response function in the Hubbard model based on the time-dependent Gutzwiller approximation. The results are in excellent agreement with exact diagonalization on small clusters and are reliable even for high densities, where the usual ladder approximation breaks down. We apply the theory to the computation of antibound states relevant for Auger spectroscopy and cold atom physics.
authors.affiliation: Institut für Physik, BTU Cottbus, P.O. Box 101344, 03013 Cottbus, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Seibold
authors.forename: F
authors.initials: F
authors.lastname: Becca
authors.forename: J
authors.initials: J
authors.lastname: Lorenzana