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Diffusion coefficient in periodic and random potentials

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dc.contributor.author Khoury, Maria
dc.contributor.author Gleeson, James P.
dc.contributor.author Sancho, J. M.
dc.contributor.author Lacasta, A. M.
dc.contributor.author Lindenberg, Katja
dc.date.accessioned 2010-01-08T11:02:48Z
dc.date.available 2010-01-08T11:02:48Z
dc.date.issued 2009
dc.identifier.citation Khoury, M., Gleeson, J.P., Sancho1, J. M., Lacasta, A. M. and Lindenberg, K. (2009) 'Diffusion coefficient in periodic and random potentials', Physical Review E 80, 021123 en_US
dc.identifier.uri http://hdl.handle.net/10344/350
dc.description peer-reviewed
dc.description.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. en_US
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.relation.ispartofseries Physical Review E;80 Art No. 021123
dc.relation.uri http://dx.doi.org/10.1103/PhysRevE.80.021123
dc.subject perturbation theory en_US
dc.subject surface diffusion en_US
dc.title Diffusion coefficient in periodic and random potentials en_US
dc.type Journal Article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.type.restriction none en
dc.contributor.sponsor SFI
dc.relation.projectid 06/IN.1/I366
dc.relation.projectid MACSI


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