title: Nonlinear resonant transport of Bose-Einstein condensates.
abstract: The coherent flow of a Bose-Einstein condensate through a quantum dot in a magnetic waveguide is studied. By the numerical integration of the time-dependent Gross-Pitaevskii equation in the presence of a source term, we simulate the propagation process of the condensate through a double barrier potential in the waveguide. We find that resonant transport is suppressed in interaction-induced regimes of bistability, where multiple scattering states exist at the same chemical potential and the same incident current. We demonstrate, however, that a temporal control of the external potential can be used to circumvent this limitation and to obtain enhanced transmission near the resonance on experimentally realistic time scales.
authors.affiliation: Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Paul
authors.forename: Klaus
authors.initials: K
authors.lastname: Richter
authors.forename: Peter
authors.initials: P
authors.lastname: Schlagheck