Ratchet driven by quasimonochromatic noise.

Arrayas, M. and Mannella, R. and McClintock, Peter V. E. and McKane, A. J. and Stein, N. D. (2000) Ratchet driven by quasimonochromatic noise. Physical Review E, 61 (1). pp. 139-146. ISSN 1539-3755

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review E
Uncontrolled Keywords:
?? statistical and nonlinear physicsstatistics and probabilitycondensed matter physicsqc physics ??
ID Code:
Deposited On:
08 Mar 2010 10:58
Last Modified:
31 Dec 2023 00:17