Europhys. Lett., 65 (1) , pp. 7-12 (2004)
DOI: 10.1209/epl/i2003-10047-9

Stochastic resonance in monostable overdamped systems

M. Evstigneev¹, P. Reimann¹, V. Pankov² and R. H. Prince<sup>2

1</sup>  Universität Bielefeld, Fakultät für Physik - D-33615 Bielefeld, Germany
²  Physics and Astronomy Department, York University Toronto, Ontario M3J 1P3, Canada

(Received 15 July 2003; accepted 17 October 2003)

Abstract
We consider the response of an overdamped nonlinear oscillator driven by additive Gaussian white noise to an additive weak harmonic forcing in the context of stochastic resonance (SR). We show that, in addition to the previously reported mechanisms, there exists another type of SR, which can occur even when the system is monostable. If the system is multistable, SR of this new type can coexist with the conventional SR in an appropriate frequency range. Further immediate extensions include stochastic anti- and multi-resonance in overdamped monostable systems.

PACS
05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
02.50.Ey - Stochastic processes.

© EDP Sciences 2004