Effect of boundary conditions on the invariant density of noisy maps at fully-developed chaos
The invariant density of one-dimensional maps in the regime of fully-developed chaos with uncorrelated additive noise is considered. Boundary conditions are shown to play a significant role in determining the precise form of the invariant density, via the manner in which they handle the spill-over, caused by the noise, of orbits beyond the interval. The known case of periodic boundary conditions is briefly recapitulated. Analytic solutions for the invariant density that are possible under certain conditions are presented with applications to specific well-known maps. The case of ‘sticky’ boundaries is generalized to ‘re-injection at the nearest boundary’, and the exact functional equations determining the invariant density are derived. Interesting boundary layer effects are shown to occur, that lead to significant modifications of the invariant density corresponding to the unperturbed (noise-free) case, even when the latter is a constant — as illustrated by an application of the formalism to the noisy tent map. All our results are non-perturbative, and hold good for any noise amplitude in the interval.
KeywordsOne-dimensional maps fully developed chaos invariant density boundary conditions noise
PACS Nos05.45 05.40
Unable to display preview. Download preview PDF.
- E Knobloch and J B Weiss, inNoise in nonlinear dynamical systems edited by F Moss and P V E McClintock (Cambridge Univ. Press, Cambridge, 1989) vol. 2, p. 65Google Scholar
- P Talkner and P Hänggi, inNoise in nonlinear dynamical systems edited by F Moss and P V E McClintock (Cambridge Univ. Press, Cambridge, 1989) vol. 2, p. 87Google Scholar
- S N Rasband,Chaotic dynamics of nonlinear systems (Wiley, New York, 1989)Google Scholar
- P C Hemmer,J. Phys. A17, L247 (1984)Google Scholar