Ratchet driven by quasimonochromatic noise

M. Arrayás, R. Mannella, P. V E McClintock, A. J. McKane, N. D. Stein

    Research output: Contribution to journalArticlepeer-review


    The currents generated by noise-induced activation processes in a periodic potential are investigated analytically, by digital simulation and by performing analog experiments. The noise is taken to be quasimonochromatic and the potential to be a smoothed sawtooth. Two analytic approaches are studied. The first involves a perturbative expansion in inverse powers of the frequency characterizing quasimonochromatic noise and the second is a direct numerical integration of the deterministic differential equations obtained in the limit of weak noise. These results, together with the digital and analog experiments, show that the system does indeed give rise, in general, to a net transport of particles. All techniques also show that a current reversal exists for a particular value of the noise parameters.
    Original languageEnglish
    Pages (from-to)139-146
    Number of pages7
    JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
    Issue number1
    Publication statusPublished - Jan 2000


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