Long-Time Correlations in Stochastic Systems

Details Long-Time Correlations in Stochastic Systems Long-Time Correlations in Stochastic Systems

2005-01-11

arxiv.org/abs/nlin/0501024v1

Nonlinear Sciences

Chaotic Dynamics

Plain TeX, 9 pages, 4 figures. Presented at US-Japan Workshop on Statistical Physics and Chaos in Fusion Plasmas, Austin, Texa

Scientific paper

In recent years, there has been considerable interest in understanding the motion in Hamiltonian systems when phase space is divided into stochastic and integrable regions. This paper studies one aspect of this problem, namely, the motion of trajectories in the stochastic sea when there is a small island present. The results show that the particle can be stuck close to the island for very long times. For the standard mapping, where accelerator modes are possible, it appears that the mean squared displacement of particles in the stochastic sea may increase faster than linearly with time indicating non-diffusive behavior.

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