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- Title
Phase Space Transport in Noisy Hamiltonian Systems.
- Authors
KANDRUP, HENRY E.
- Abstract
ABSTRACT: This paper analyses the effect of low amplitude friction and noise in accelerating phase space transport in time-independent Hamiltonian systems that exhibit global stochasticy. Numerical experiments reveal that even very weak non-Hamiltonian perturbations can dramatically increase the rate at which an ensemble of orbits penetrates obstructions like cantori or Arnold Webs, thus accelerating the approach toward an invariant measure, i.e., a microcanonical population of the accessible phase space region. An investigation of first passage times through cantori leads to three conclusions, namely: (i) that, at least for white noise, the detailed form of the perturbation is unimportant, (ii) that the presence or absence of friction is largely irrelevant, and (iii) that, overall, the amplitude of the response to weak noise scales logarithmically in the amplitude of the noise.
- Publication
Annals of the New York Academy of Sciences, 1998, Vol 867, Issue 1, p320-1
- ISSN
0077-8923
- Publication type
Article
- DOI
10.1111/j.1749-6632.1998.tb11267.x