Stochastic resonance with weak monochromatic driving: gains above unity induced by high-frequency signals

Abstract

We study the effects of a high-frequency (HF) signal on the response of a noisy bistable system to a low-frequency subthreshold sinusoidal signal. We show that, by conveniently choosing the ratio of the amplitude of the HF signal to its frequency, stochastic resonance gains greater than unity can be measured at the low-frequency value. Thus, the addition of the HF signal can entail an improvement in the detection of weak monochromatic signals. The results are explained in terms of an effective model and illustrated by means of numerical simulations.

5 pages, 2 figures

References in corpus (6)

• Effects of additive noise on vibrational resonance in a bistable system
• Two-state theory of nonlinear Stochastic Resonance
• Vibrational ratchets
• High-frequency effects in the FitzHugh-Nagumo neuron model
• Gain in Stochastic Resonance: Precise Numerics versus Linear Response Theory beyond the Two-Mode Approximation
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Cited by in corpus (4)

• Vibrational mechanics in an optical lattice: controlling transport via potential renormalization
• Finite size fluctuations and stochastic resonance in globally coupled bistable systems
• General approach for dealing with dynamical systems with spatiotemporal periodicities
• Stochastic resonance in finite arrays of bistable elements with local coupling