Conditional Speed and Shape Corrections for Travelling Wave Solutions to Stochastically Perturbed Reaction-Diffusion Systems

arXiv (Cornell University)

Abstract

In this work we perform rigorous small noise expansions to study the impact of stochastic forcing on the behaviour of planar travelling wave solutions to reaction-diffusion equations on cylindrical domains. In particular, we use a stochastic freezing approach that allows effective limiting information to be extracted concerning the behaviour of the stochastic perturbations from the deterministic wave. As an application, this allows us to provide a rigorous definition for the stochastic corrections to the wave speed. In addition, our approach allows their size to be computed to any desired order in the noise strength, provided that sufficient smoothness is available.

Authors 3

1. Mark van den Bosch
2. Christian Hamster

   University of Amsterdam

   Affiliation as printed

   Dutch Institute for Emergent Phenomena , Universiteit van Amsterdam , P.O. Box 94248 , 1090 GE Amsterdam , The Netherlands

   KdV Institute , Universiteit van Amsterdam , P.O. Box 94248 , 1090 GE Amsterdam , The Netherlands

3. Hermen Jan Hupkes Aachen Mathematisch Instituut

   Leiden University

   Affiliation as printed

   Mathematisch Instituut , Universiteit Leiden , P.O. Box 9512 , 2300 RA Leiden , The Netherlands