Diffusion coefficient in periodic and random potentials

M. Khoury, James P. Gleeson, J. M. Sancho, A. M. Lacasta, Katja Lindenberg

Research output: Contribution to journalArticlepeer-review

Abstract

Transport and diffusion of particles on modulated surfaces is a nonequilibrium problem which is receiving a great deal of attention due to its technological applications, but analytical calculations are scarce. In earlier work, we developed a perturbative approach to begin to provide an analytic platform for predictions about particle trajectories over such surfaces. In some temperature and forcing regimes, we successfully reproduced results for average particle velocities obtained from numerical simulations. In this paper, we extend the perturbation theory to the calculation of higher moments, in particular the diffusion tensor and the skewness. Numerical simulations are used to check the domain of validity of the perturbative approach.

Original languageEnglish
Article number021123
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume80
Issue number2
DOIs
Publication statusPublished - 26 Aug 2009

Fingerprint

Dive into the research topics of 'Diffusion coefficient in periodic and random potentials'. Together they form a unique fingerprint.

Cite this