title: Angular transport in a nonperiodic Chirikov-Taylor map.
abstract: Transport in angular direction is considered for a nonperiodic Chirikov-Taylor (standard) map. In the limit of large stochasticity parameter, depending on the boundary conditions of the action variable, either superdiffusive of diffusive behavior is found. In both cases characteristic oscillations in the transport coefficients occur. Theoretical predictions based on the Perron-Frobenius evolution operator formalism for the distribution function are compared with numerical simulations. Information on the anomalous behaviors in the near threshold as well as in the subthreshold regions are also presented.
authors.affiliation: Institut für Theoretische Physik, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Lesnik
authors.forename: K H
authors.initials: KH
authors.lastname: Spatschek