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Dynamics importance sampling for the activation problem in nonequilibrium continuous systems and maps

Research output: Contribution to journalJournal article

Published

<mark>Journal publication date</mark>2004
<mark>Journal</mark>Proceedings of SPIE
Volume5471
Number of pages10
Pages135-144
<mark>Original language</mark>English

Abstract

A numerical approach based on dynamic importance sampling (DIMS) is introduced to investigate the activation problem in two-dimensional nonequilibrium systems. DIMS accelerates the simulations and allows the investigation to access noise intensities that were previously forbidden. A shift in the position of the escape path compared to a heteroclinic trajectory calculated in the limit of zero noise intensity is directly observed. A theory to account for such shifts is presented and shown to agree with the simulations for a wide range of noise intensities.

Bibliographic note

Copyright 2004 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.546889