Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/18705
Full metadata record
DC FieldValueLanguage
dc.contributor.authorRocco, Andreacat
dc.contributor.authorRamírez Piscina, Laureanocat
dc.contributor.authorCasademunt i Viader, Jaumecat
dc.date.accessioned2011-07-07T12:50:58Z-
dc.date.available2011-07-07T12:50:58Z-
dc.date.issued2002-
dc.identifier.issn1539-3755-
dc.identifier.urihttp://hdl.handle.net/2445/18705-
dc.description.abstractWe study the dynamics of generic reaction-diffusion fronts, including pulses and chemical waves, in the presence of multiplicative noise. We discuss the connection between the reaction-diffusion Langevin-like field equations and the kinematic (eikonal) description in terms of a stochastic moving-boundary or sharp-interface approximation. We find that the effective noise is additive and we relate its strength to the noise parameters in the original field equations, to first order in noise strength, but including a partial resummation to all orders which captures the singular dependence on the microscopic cutoff associated with the spatial correlation of the noise. This dependence is essential for a quantitative and qualitative understanding of fluctuating fronts, affecting both scaling properties and nonuniversal quantities. Our results predict phenomena such as the shift of the transition point between the pushed and pulled regimes of front propagation, in terms of the noise parameters, and the corresponding transition to a non-Kardar-Parisi-Zhang universality class. We assess the quantitative validity of the results in several examples including equilibrium fluctuations and kinetic roughening. We also predict and observe a noise-induced pushed-pulled transition. The analytical predictions are successfully tested against rigorous results and show excellent agreement with numerical simulations of reaction-diffusion field equations with multiplicative noise.eng
dc.format.extent14 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.65.056116cat
dc.relation.ispartofPhysical Review E, 2002, vol. 65, núm. 5, p. 056116-
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevE.65.056116-
dc.rights(c) The American Physical Society, 2002eng
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)-
dc.subject.classificationFísica estadísticacat
dc.subject.classificationTermodinàmicacat
dc.subject.classificationSistemes dinàmics diferenciablescat
dc.subject.classificationDinàmica de fluidscat
dc.subject.otherStatistical physicseng
dc.subject.otherThermodynamicseng
dc.subject.otherDifferentiable dynamical systemseng
dc.subject.otherFluid dynamicseng
dc.titleKinematic reduction of reaction-diffusion fronts with multiplicative noise. Derivation of stochastic sharp-interface equationseng
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec196945-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
196945.pdf176.53 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.