Effect of Asymmetric Potential and Gaussian Colored Noise on Stochastic Resonance

作     者：HAN Yin-Xia LI Jing-Hui CHEN Shi-Gang 

作者机构：Graduate School of China Academy of Engineering Physics P.O. Box 2101 Beijing 100088 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100088 China Center for Nonlinear Studies Institute of Applied Physics and Computational Mathematics P.O. Box 8009(28) Beijing 100088 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2005年第44卷第2X期

页      面：226-230页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：国家自然科学基金 

主　　题：additive Gaussian colored noise stochastic resonance signal-to noise ratio 

摘      要：The phenomenon of stochastic resonance （SR） in a bistable nonlinear system is studied when the system is driven by the asymmetric potential and additive Gaussian colored noise. Using the unified colored noise approximation method, the additive Gaussian colored noise can be simplified to additive Gaussian white noise. The signal-to-noise ratio （SNR） is calculated according to the generalized two-state theory （shown in [H.S. Wio and S. Bouzat, Brazilian ***. 29 （1999） 136]）. We find that the SNR increases with the proximity of a to zero. In addition, the correlation time T between the additive Gaussian colored noise is also an ingredient to improve SR. The shorter the correlation time T between the Gaussian additive colored noise is, the higher of the peak value of SNR.