Angular transport in a nonperiodic Chirikov-Taylor map - art. no. 056205

Transport in angular direction is considered for a nonperiodic Chirikov-Tay lor (standard) map. In the limit of large stochasticity parameter, dependin g on the boundary conditions of the action variable, either superdiffusive of diffusive behavior is found. In both cases characteristic oscillations i n the transport coefficients occur. Theoretical predictions based on the Pe rron-Frobenius evolution operator formalism for the distribution function a re compared with numerical simulations. Information on the anomalous behavi ors in the near threshold as well as in the subthreshold regions are also p resented.