Resonance phenomena in discrete systems with bichromatic input signal |
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Authors: | K P Harikrishnan G Ambika |
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Institution: | (1) Department of Physics, The Cochin College, Cochin, 682002, India;(2) Indian Institute of Science Education and Research, Pune, 411008, India |
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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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Keywords: | 05 10 -a Computational methods in statistical physics and nonlinear dynamics 05 40 Ca Noise |
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