Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/18824
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dc.contributor.authorBonet i Avalos, Josepcat
dc.contributor.authorPagonabarraga Mora, Ignaciocat
dc.date.accessioned2011-07-07T12:53:30Z-
dc.date.available2011-07-07T12:53:30Z-
dc.date.issued1995-
dc.identifier.issn1063-651X-
dc.identifier.urihttps://hdl.handle.net/2445/18824-
dc.description.abstractIn this paper we address the problem of consistently constructing Langevin equations to describe fluctuations in nonlinear systems. Detailed balance severely restricts the choice of the random force, but we prove that this property, together with the macroscopic knowledge of the system, is not enough to determine all the properties of the random force. If the cause of the fluctuations is weakly coupled to the fluctuating variable, then the statistical properties of the random force can be completely specified. For variables odd under time reversal, microscopic reversibility and weak coupling impose symmetry relations on the variable-dependent Onsager coefficients. We then analyze the fluctuations in two cases: Brownian motion in position space and an asymmetric diode, for which the analysis based in the master equation approach is known. We find that, to the order of validity of the Langevin equation proposed here, the phenomenological theory is in agreement with the results predicted by more microscopic modelseng
dc.format.extent12 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoengeng
dc.publisherThe American Physical Societyeng
dc.relation.isformatofReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.52.5881cat
dc.relation.ispartofPhysical Review E, 1995, vol. 52, núm. 6, p. 5881-5892-
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevE.52.5881-
dc.rights(c) American Physical Society, 1995-
dc.sourceArticles publicats en revistes (Física de la Matèria Condensada)-
dc.subject.classificationEquacions diferencials estocàstiquescat
dc.subject.classificationMecànica estadísticacat
dc.subject.classificationEquació de Fokker-Planckcat
dc.subject.classificationMoviment browniàcat
dc.subject.otherStochastic differential equationseng
dc.subject.otherStatistical mechanicseng
dc.subject.otherFokker-Planck equationeng
dc.subject.otherBrownian movementseng
dc.titlePhenomenological approach to nonlinear Langevin equationseng
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec507874-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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