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Two-state theory of nonlinear stochastic resonance

 

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Author: Casado Pascual, Jesús
Gómez Ordóñez, José
Morillo Buzón, Manuel
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2003-11-21
Published in: Physical Review Letters, 91 (21), 210601-1-210601-4.
Document type: Article
Abstract: An amenable, analytical two-state description of the nonlinear population dynamics of a noisy bistable system driven by a rectangular subthreshold signal is put forward. Explicit expressions for the driven population dynamics, the correlation function (its coherent and incoherent parts), the signal-to-noise ratio (SNR), and the stochastic resonance (SR) gain are obtained. Within a suitably chosen range of parameter values this reduced description yields anomalous SR gains exceeding unity and, simultaneously, gives rise to a nonmonotonic behavior of the SNR vs the noise strength. The analytical results agree well with those obtained from numerical solutions of the Langevin equation.
Cite: Casado Pascual, J., Gómez Ordóñez, J. y Morillo Buzón, M. (2003). Two-state theory of nonlinear stochastic resonance. Physical Review Letters, 91 (21), 210601-1-210601-4.
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URI: http://hdl.handle.net/11441/62707

DOI: 10.1103/PhysRevLett.91.210601

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