Abstract
The effects of time delay on stochastic resonance (SR) in a bistable system with time delay, correlated noises and periodic signal are studied by using the theory of signal-to-noise ratio (SNR). The expression of the SNR is derived under the adiabatic limit and the small delay time approximation. It is found that: (i) For the case of no correlations between multiplicative and additive noise, the delay time τ can enhance the SNR as a function of the multiplicative noise intensity α and it can restrain the SNR as a function of the additive noise intensity D; (ii) For the case of correlations between multiplicative and additive noise, τ can induce a minimum and maximum in curve of the SNR as a function of α, and can intensively restrain the SNR as a function of the D and there is a critical value of delay tim τ c =0.1 in the height of the SNR peak with change of τ, i.e., when τ takes value blow τ c , the τ boosts up the SNR as a function of the strength λ of correlations between multiplicative and additive noise, however, when τ takes value above τ c , the τ restrains that.
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Mei, D.C., Du, L.C. & Wang, C.J. The Effects of Time Delay on Stochastic Resonance in a Bistable System with Correlated Noises. J Stat Phys 137, 625–638 (2009). https://doi.org/10.1007/s10955-009-9864-4
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DOI: https://doi.org/10.1007/s10955-009-9864-4