Mobility and stochastic resonance in spatially inhomogeneous system

Details Mobility and stochastic resonance in spatially inhomogeneous system Mobility and stochastic resonance in spatially inhomogeneous system

1999-07-22

arxiv.org/abs/cond-mat/9907353v1

Phys. Rev. E 60, 6421 (1999)

Physics

Condensed Matter

Statistical Mechanics

14 pages, 12 figures. Submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.60.6421

The mobility of an overdamped particle, in a periodic potential tilted by a constant external field and moving in a medium with periodic friction coefficient is examined. When the potential and the friction coefficient have the same periodicity but have a phase difference, the mobility shows many interesting features as a function of the applied force, the temperature, etc. The mobility shows stochastic resonance even for constant applied force, an issue of much recent interest. The mobility also exhibits a resonance like phenomenon as a function of the field strength and noise induced slowing down of the particle in an appropriate parameter regime.

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