Normal and anomalous diffusions in web map driven by a constant external force

摘要: Abstract We consider the conservative web map x n +1 = y , n+1 =−x −K sin +Γ where Γ is external constant force. For a range of values K with =0 diffusion found to be anomalous (Zaslavsky et al., Chaos 7 (1997) 159) due presence accelerator mode islands. investigate effect on (both dispersive and enhanced) normal diffusions for four fixed . show occurrence transition from vice-versa processes by varying value zero. characterize dynamics using exponents μ – describing evolution mean-square displacement β variance short time moving distance, velocity spectrum, kurtosis propagator. The are depend strongly force that probability distributions variables Levy.