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Stochastic resonance.

Research output: Contribution in Book/Report/ProceedingsChapter


Publication date1994
Host publicationNonlinearity and Chaos in Engineering Dynamics
EditorsJ. M. T. Thompson, S. R. Bishop
Place of publicationNew York
Number of pages10
<mark>Original language</mark>English


We review stochastic resonance (SR), a counter-intuitive phenomenon in which the signal due to a weak periodic force in a nonlinear system can be enhanced by the addition of external noise. A theoretical approach based on linear response theory (LRn is described. It is pointed out that, although the LRT theory of SR is by definition restricted to the small-signal limit. it possesses substantial advantages in terms of simplicity, generality and predictive power. We outline the application of LRT to overdamped motion in a bistable potential, the most commonly studied form of SR. Two new forms of SR, predicted on the basis of LRT and subsequently observed in analogue electronic experiments, are described.