ASYMMETRIC EFFECTS ON STOCHASTIC RESONANCE IN THE BISTABLE SYSTEM SUBJECT TO CORRELATED NOISES

被引:1
|
作者
Long, Fei [1 ]
Mei, Dongcheng [1 ]
机构
[1] Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
Stochastic resonance; correlated noises; asymmetric effects; bistable system; PHASE-TRANSITION; GAUSSIAN-NOISE; TIME;
D O I
10.1142/S0217979212501251
中图分类号
O59 [应用物理学];
学科分类号
摘要
Asymmetric effects on the stochastic resonance (SR) in the bistable system with correlated noises are investigated. Based on the theory of signal-to-noise ratio (SNR), the expressions of SNR are derived for the case of the additive signal and the case of the multiplicative signal, respectively. Through the numerical computation, it is found in both cases of additive and multiplicative periodic signals (i) The asymmetric effects on SR phenomenon in the system induced by the multiplicative noise is dependent of initial conditions, i. e., the asymmetric parameter r weakens the SR for the initial condition of x(t = 0) = x(+), however, r enhances the SR for the initial condition of x(t = 0) = x(-); (ii) The asymmetric effects on SR phenomenon in the system induced by the additive noise and the correlation between noises is independent of initial conditions, i. e., the r always enhance the SR; (iii) Synergistic action of the noises, the correlation between noises, the periodic signal and the system's asymmetry induces symmetry revival.
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页数:14
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