title: Landau-Zener transitions in a dissipative environment: numerically exact results.
abstract: We study Landau-Zener transitions in a dissipative environment by means of the numerically exact quasiadiabatic propagator path integral. It allows to cover the full range of the involved parameters. We discover a nonmonotonic dependence of the transition probability on the sweep velocity which is explained in terms of a simple phenomenological model. This feature, not captured by perturbative approaches, results from a nontrivial competition between relaxation and the external sweep.
authors.affiliation: Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstrasse 19, 79104 Freiburg, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Nalbach
authors.forename: M
authors.initials: M
authors.lastname: Thorwart