Eur. Phys. J. B 29, 123-128 (2002)
https://doi.org/10.1140/epjb/e2002-00269-7

Stochastic multiresonance in a bistable sawtooth potential driven by correlated multiplicative and additive noise

¹ State Key Laboratory of Laser Technology (Huazhong University of Science and Technology), Wuhan 430074, PR China
² Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, PR China
³ CCAST (World Laboratory), PO Box 8730, Beijing 100080, PR China

Corresponding author: ^a dajinwu@public.wh.hb.cn

Received: 26 February 2002
Revised: 12 July 2002
Published online: 17 September 2002

Abstract

We present an analytic investigation of the signal-to-noise ratio (SNR) by studying the bistable sawtooth system driven by correlated Gaussian white noises. The analytic expression of SNR is obtained. Based on it, we detect the phenomenon of stochastic multiresonance, which arises from the dependence of SNR upon the noises correlation coefficient. Furthermore, there exists not only resonance, but also suppression in the (the additive noise intensity)  curve and the (the multiplicative noise intensity) curve.