Phenomenon of entropic stochastic resonance with asymmetric dichotomous noise and white noise

• Published in: Journal of the Korean Physical Society Vol. 60; no. 3; pp. 327 - 332
• Main Authors: Guo, Feng, Li, Shao-Fu, Cheng, Xiao-Feng
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.02.2012; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Asymmetric dichotomous noise; Signal-to-noise ratio; Square-wave signal; Entropic stochastic resonance
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.60.327

The entropic stochastic resonance (ESR) in a confined system subject to asymmetric dichotomous noise, white noise, and a periodic square-wave signal is investigated. Under the adiabatic approximation condition, by use of the properties of the dichotomous noise, we obtain the expression of the output signal-to-noise ratio (SNR) based on two-state theory. The SNR is shown to be a nonmonotonic function of the strength and asymmetry of the dichotomous noise, the intensity of the white noise, and the amplitude of the square-wave signal. The SNR varies non-monotonically with increases in the parameters of the confined structure. The influence of the correlation rate of the dichotomous noise and the frequency of the external constant force on the SNR is also discussed.