title: Solving the Kadanoff-Baym equations for inhomogeneous systems: application to atoms and molecules.
abstract: We implement time propagation of the nonequilibrium Green function for atoms and molecules by solving the Kadanoff-Baym equations within a conserving self-energy approximation. We here demonstrate the usefulness of time propagation for calculating spectral functions and for describing the correlated electron dynamics in a nonperturbative electric field. We also demonstrate the use of time propagation as a method for calculating charge-neutral excitation energies, equivalent to highly advanced solutions of the Bethe-Salpeter equation.
authors.affiliation: Theoretical Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
authors.forename: Nils Erik
authors.initials: NE
authors.lastname: Dahlen
authors.forename: Robert
authors.initials: R
authors.lastname: van Leeuwen