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. 2010 May;81(5 Pt 1):051123.
doi: 10.1103/PhysRevE.81.051123. Epub 2010 May 18.

Stochastic resonance in a trapping overdamped monostable system

N V Agudov  1 , A V Krichigin, D Valenti, B Spagnolo
Affiliations

Stochastic resonance in a trapping overdamped monostable system

N V Agudov et al. Phys Rev E Stat Nonlin Soft Matter Phys. 2010 May.

Abstract

The response of a trapping overdamped monostable system to a harmonic perturbation is analyzed, in the context of stochastic resonance phenomenon. We consider the dynamics of a Brownian particle moving in a piecewise linear potential with a white Gaussian noise source. Based on linear-response theory and Laplace transform technique, analytical expressions of signal-to-noise ratio (SNR) and signal power amplification (SPA) are obtained. We find that the SNR is a nonmonotonic function of the noise intensity, while the SPA is monotonic. Theoretical results are compared with numerical simulations.

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