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Non-Gaussian diffusion near surfaces

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorALEXANDRE, Arthur
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorLAVAUD, Maxime
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorFARES, Nicolas
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorMILLAN, Elodie
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorLOUYER, Yann
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorSALEZ, Thomas
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorAMAROUCHENE, Yacine
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorGUÉRIN, Thomas
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDEAN, David S.
dc.date.issued2023
dc.identifier.issn0031-9007
dc.description.abstractEnWe study the diffusion of particles confined close to a single wall and in double-wall planar channel geometries where the local diffusivities depend on the distance to the boundaries. Displacement parallel to the walls is Brownian as characterized by its variance, but it is non-Gaussian having a non-zero fourth cumulant. Establishing a link with Taylor dispersion, we calculate the fourth cumulant and the tails of the displacement distribution for general diffusivity tensors along with potentials generated by either the walls or externally, for instance gravity. Experimental and numerical studies of the motion of a colloid in the direction parallel to the wall give measured fourth cumulants which are correctly predicted by our theory. Interestingly, contrary to models of Brownian-yet-non-Gaussian diffusion, the tails of the displacement distribution are shown to be Gaussian rather than exponential. All together, our results provide additional tests and constraints for the inference of force maps and local transport properties near surfaces.
dc.description.sponsorshipPremières rencontres en environnement complexe - ANR-21-CE30-0020
dc.description.sponsorshipMouvement brownien au voisinage d'interfaces molles - ANR-21-ERCC-0010
dc.description.sponsorshipCapteur Interférométrique de Contraintes de Surface - ANR-21-CE06-0029
dc.description.sponsorshipFrottements dans les systèmes complexes - ANR-21-CE06-0039
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enNon-Gaussian diffusion near surfaces
dc.typeArticle de revue
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Mécanique statistique [cond-mat.stat-mech]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
dc.subject.halPhysique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
dc.identifier.arxiv2207.01880
dc.description.sponsorshipEuropeBrownian Motion near Soft Interfaces
bordeaux.journalPhysical Review Letters
bordeaux.page077101
bordeaux.volume130
bordeaux.peerReviewedoui
hal.identifierhal-03713580
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03713580v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20Letters&rft.date=2023&rft.volume=130&rft.spage=077101&rft.epage=077101&rft.eissn=0031-9007&rft.issn=0031-9007&rft.au=ALEXANDRE,%20Arthur&LAVAUD,%20Maxime&FARES,%20Nicolas&MILLAN,%20Elodie&LOUYER,%20Yann&rft.genre=article


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