Abstract.
We undertake a detailed numerical study of the twin phenomenon of stochastic and vibrational resonance in a discrete model system in the presence of bichromatic input signal. A two parameter cubic map is used as the model that combines the features of both bistable and threshold systems. In addition to the results already shown for continuous systems, our analysis brings out several interesting features both for vibrational and stochastic resonance, including the existence of a cross over behavior between the two. In the regime of vibrational resonance, it is shown that the additional high frequency forcing can change the effective value of the system parameter resulting in the shift of the bistable window. In the case of stochastic resonance, the study reveals a fundamental difference between the bistable and threshold mechanisms in the response, with respect to multisignal input.
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Harikrishnan, K., Ambika, G. Resonance phenomena in discrete systems with bichromatic input signal. Eur. Phys. J. B 61, 343–353 (2008). https://doi.org/10.1140/epjb/e2008-00083-3
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DOI: https://doi.org/10.1140/epjb/e2008-00083-3