Stochastic Resonance in a Bistable System Subject to Non-Gaussian and Gaussian Noises  

作　　者：ZENG Chun-Hua CHEN Li-Li XIE Chong-Wei 

机构地区：[1]Department of Physics, Yunnan University, Kunming 650091, China [2]Faculty of Continuing Education, Kunming University of Science and Technology, Kunming 650093, China

出　　处：《Communications in Theoretical Physics》2008年第11期1165-1168,共4页理论物理通讯（英文版）

基　　金：supported by the Natural Science Foundation of Yunnan Province under Grant No.2005A0002M

摘　　要：In this paper, we consider the phenomenon of stochastic resonance （SR） in a quartic bistable system under the simultaneous action of a multiplicative non-Gaussian and an additive Gaussian noises and a weak periodic signal. The expression of the signal-to-noise ratio R is derived by applying the two-state theory in adiabatic limit. We discuss the effects of the parameter q indicating the departure of the non-Gaussian noise from the Gaussian noise, the correlation time r of the non-Gaussian noise, and coupling intensity A between two noise terms on the stochastic resonance. It is found that the signM-to-noise ratio of the system, as a function of the additive noise intensity, undergoes the transition from having one peak to having two peaks, and then to having one peak again when the parameter q or the noise correlation time τ is increased. The parameter q and τ play opposite roles in the SR of the system.

关 键 词：stochastic resonance non-Gaussian noise 

分 类 号：O4[理学—物理]