Issue
EPL
Volume 77, Number 2, January 2007
Article Number 20005
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/77/20005
Published online 17 January 2007
EPL, 77 (2007) 20005
DOI: 10.1209/0295-5075/77/20005

Multi-scale diffusion on an interface

C. Chevalier and F. Debbasch

ERGA-LERMA, Université Paris 6, UMR 8112 - 3 rue Galilée, 94200 Ivry, France


received 26 June 2006; accepted in final form 20 November 2006; published January 2007
published online 17 January 2007

Abstract
We investigate how small scale metric fluctuations on a 2D interface influence large scale lateral diffusion. We find that the effect of these fluctuations can be cumulative and grow exponentially with time; we also estimate the typical time after which the predictions of a model that ignores the small scale fluctuations substantially differ from the predictions of a more realistic model, which takes those fluctuations into account.

PACS
02.40.Ky - Riemannian geometries .
05.10.Gg - Stochastic analysis methods (Fokker-Planck, Langevin, etc.) .
05.40.Jc - Brownian motion .

© Europhysics Letters Association 2007