Stochastic Resonance in a Bistable Sawtooth Potential Driven by Correlated Multiplicative and Additive Noise
WANG Jun1,3, CAO Li1,2,3, WU Da-Jin2,3
1State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Stochastic Resonance in a Bistable Sawtooth Potential Driven by Correlated Multiplicative and Additive Noise
WANG Jun1,3;CAO Li1,2,3;WU Da-Jin2,3
1State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
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. We detect some novel results, as follows. (1) Stochastic resonance (SR) always occurs in the SNR-Q (the multiplicative noise intensity) curve for the whole range of correlation coefficient. (2) There are not only resonance but also suppression and monotony in the dependence of SNR upon the additive noise intensity. (3) There are two extrema (one is minimum, the other maximum) in the SNR-b (the barrier height) curve for different multiplicative noise intensity.
(Fluctuation phenomena, random processes, noise, and Brownian motion)
引用本文:
WANG Jun;CAO Li;;WU Da-Jin;. Stochastic Resonance in a Bistable Sawtooth Potential Driven by Correlated Multiplicative and Additive Noise[J]. 中国物理快报, 2002, 19(10): 1416-1419.
WANG Jun, CAO Li, , WU Da-Jin,. Stochastic Resonance in a Bistable Sawtooth Potential Driven by Correlated Multiplicative and Additive Noise. Chin. Phys. Lett., 2002, 19(10): 1416-1419.
2002, Vol. 19 
