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Published on: February 5, 2017
Stochastic resonance in a trapping overdamped monostable system
N V Agudov1, A V Krichigin, D Valenti
1Radiophysics Faculty, Nizhniy Novgorod State University, 23 Gagarin Avenue, 603950 Nizhniy Novgorod, Russia. agudov@rf.unn.ru
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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