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Sample-to-sample torque fluctuations in a system of coaxial randomly charged surfaces

hal.structure.identifierSchool of physics [IPM]
hal.structure.identifierDepartment of Applied Mathematics and Theoretical Physics [DAMTP]
dc.contributor.authorNAJI, Ali
hal.structure.identifierDepartment of Physics
dc.contributor.authorSARABADANI, Jalal
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
hal.structure.identifierPhysique Statistique des Systèmes Complexes (LPT) [PhyStat]
dc.contributor.authorDEAN, David
hal.structure.identifierDepartment of Theoretical Physics
hal.structure.identifierDepartment of Physics
dc.contributor.authorPODGORNIK, Rudolf
dc.date.created2011-12-10
dc.date.issued2012-03
dc.identifier.issn1292-8941
dc.description.abstractEnPolarizable randomly charged dielectric objects have been recently shown to exhibit long-range lateral and normal interaction forces even when they are effectively net neutral. These forces stem from an interplay between the quenched statistics of random charges and the induced dielectric image charges. This type of interaction has recently been evoked to interpret measurements of Casimir forces in vacuo, where a precise analysis of such disorder-induced effects appears to be necessary. Here we consider the torque acting on a randomly charged dielectric surface (or a sphere) mounted on a central axle next to another randomly charged surface and show that although the resultant mean torque is zero, its sample-to-sample fluctuation exhibits a long-range behavior with the separation distance between the juxtaposed surfaces and that, in particular, its root-mean-square value scales with the total area of the surfaces. Therefore, the disorder-induced torque between two randomly charged surfaces is expected to be much more pronounced than the disorder-induced lateral force and may provide an effective way to determine possible disorder effects in experiments, in a manner that is independent of the usual normal force measurement.
dc.language.isoen
dc.publisherEDP Sciences: EPJ
dc.title.enSample-to-sample torque fluctuations in a system of coaxial randomly charged surfaces
dc.typeArticle de revue
dc.identifier.doi10.1140/epje/i2012-12024-y
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Mécanique statistique [cond-mat.stat-mech]
dc.identifier.arxiv1112.2263
bordeaux.journalEuropean Physical Journal E: Soft matter and biological physics
bordeaux.page24 (1-7)
bordeaux.volume35
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-00694582
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00694582v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=European%20Physical%20Journal%20E:%20Soft%20matter%20and%20biological%20physics&rft.date=2012-03&rft.volume=35&rft.issue=3&rft.spage=24%20(1-7)&rft.epage=24%20(1-7)&rft.eissn=1292-8941&rft.issn=1292-8941&rft.au=NAJI,%20Ali&SARABADANI,%20Jalal&DEAN,%20David&PODGORNIK,%20Rudolf&rft.genre=article


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