title: Directed transport and Floquet analysis for a periodically kicked wave packet at a quantum resonance.
abstract: The dynamics of a kicked quantum mechanical wave packet at a quantum resonance is studied in the framework of Floquet analysis. It is seen how a directed current can be created out of a homogeneous initial state at certain resonances in an asymmetric potential. The almost periodic parameter dependence of the current is found to be connected with level crossings in the Floquet spectrum.
authors.affiliation: Department of Physics, Royal Institute of Technology, AlbaNova, SE-106 91 Stockholm, Sweden.
authors.forename: Emil
authors.initials: E
authors.lastname: Lundh