Asymptotic expansions for the escape rate of stochastically perturbed unimodal maps

Details Asymptotic expansions for the escape rate of stochastically perturbed unimodal maps Asymptotic expansions for the escape rate of stochastically perturbed unimodal maps

2008-05-29

arxiv.org/abs/0805.4570v3

Physica D 238, 2404-2408 (2009)

Nonlinear Sciences

Chaotic Dynamics

7 pages, 5 figures

Scientific paper

The escape rate of a stochastic dynamical system can be found as an expansion in powers of the noise strength. In previous work the coefficients of such an expansion for a one-dimensional map were fitted to a general form containing a few parameters. These parameters were found to be related to the fractal structure of the repeller of the system. The parameter alpha, the "noise dimension", remains to be interpreted. This report presents new data for alpha showing that the relation to the dimensions is more complicated than predicted in earlier work and oscillates as a function of the map parameter, in contrast to other dimension-like quantities.

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