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Stochastic Resonance in a simple model of magnetic reversals

By Roberto Benzi and Jean-Francois Pinton

Abstract

We discuss the effect of stochastic resonance in a simple model of magnetic reversals. The model exhibits statistically stationary solutions and bimodal distribution of the large scale magnetic field. We observe a non trivial amplification of stochastic resonance induced by turbulent fluctuations, i.e. the amplitude of the external periodic perturbation needed for stochastic resonance to occur is much smaller than the one estimated by the equilibrium probability distribution of the unperturbed system. We argue that similar amplifications can be observed in many physical systems where turbulent fluctuations are needed to maintain large scale equilibria.Comment: 6 page

Topics: Nonlinear Sciences - Chaotic Dynamics
Year: 2011
DOI identifier: 10.1142/S0218127411030684
OAI identifier: oai:arXiv.org:1104.4417
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