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Stochastic vortex dynamics in two-dimensional easy-plane ferromagnets: Multiplicative versus additive noise

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dc.affiliation.dptoUC3M. Departamento de Matemáticases
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Interdisciplinar de Sistemas Complejos (GISC)es
dc.contributor.authorKamppeter, Till
dc.contributor.authorMertens, Franz G.
dc.contributor.authorMoro, Esteban
dc.contributor.authorSánchez, Angel
dc.contributor.authorBishop, Alan R.
dc.date.accessioned2012-08-23T11:35:02Z
dc.date.available2012-08-23T11:35:02Z
dc.date.issued1999-05-01
dc.description.abstractWe study how thermal fluctuations affect the dynamics of vortices in the two-dimensional classical, ferromagnetic, anisotropic Heisenberg model depending on their additive or multiplicative character. Using a collective coordinate theory, we analytically show that multiplicative noise, arising from fluctuations in the local-field term of the Landau-Lifshitz equations, and Langevin-like additive noise both have the same effect on vortex dynamics ~within a very plausible assumption consistent with the collective coordinate approach!. This is a nontrivial result, as multiplicative and additive noises usually modify the dynamics quite differently. We also carry out numerical simulations of both versions of the model finding that they indeed give rise to very similar vortex dynamics.es
dc.description.statusPublicadoes
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationPhysical Review B, vol. 59, n. 17, 1 may 1999. Pp. 11349-11357es
dc.identifier.doi10.1103/PhysRevB.59.11349
dc.identifier.issn1098-0121 (print version)
dc.identifier.issn1550-235X (online version)
dc.identifier.urihttp://hdl.handle.net/10016/15125
dc.language.isoenges
dc.publisherAmerican Physical Societyes
dc.relation.publisherversionhttp://dx.doi.org/10.1103/PhysRevB.59.11349
dc.rights.accessRightsopen accesses
dc.subject.ecienciaMatemáticases
dc.titleStochastic vortex dynamics in two-dimensional easy-plane ferromagnets: Multiplicative versus additive noisees
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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