Stochastic resonance and ratchets

Xue-Juan Zhang; Gong-Qiang You

doi:10.1117/12.609656

23 May 2005 Stochastic resonance and ratchets

Xue-Juan Zhang, Gong-Qiang You

Proceedings Volume 5845, Noise in Complex Systems and Stochastic Dynamics III; (2005) https://doi.org/10.1117/12.609656
Event: SPIE Third International Symposium on Fluctuations and Noise, 2005, Austin, Texas, United States

Abstract

Ratchet effect and the phenomenon of stochastic resonance (SR) are investigated numerically in different random systems. For a simple flashing ratchet model, it is shown that both the power spectrum amplitude and the mean mobility of the system vary nonmonotonically in similar manners with the increase of the noise intensity. And for a Brownian motor with stochastic state-jumping, fixing the noise level in an anisotropic potential and merely increasing the thermal fluctuation in a flat potential not only causes the increasing of the mean mobility to a saturated value, but also induce the spectrum-measured SR. However, increasing the noise intensities in two potentials simultaneously induces mobility-measured SR, but no spectrum-measured SR can be observed.

Citation Download Citation

Xue-Juan Zhang and Gong-Qiang You "Stochastic resonance and ratchets", Proc. SPIE 5845, Noise in Complex Systems and Stochastic Dynamics III, (23 May 2005); https://doi.org/10.1117/12.609656

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