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Open Access item Coherence Resonance in Chaotic Systems

Authors:Palenzuela, Carlos
Toral, Raúl
Mirasso, Claudio R.
Calvo, Óscar
Gunton, James D.
Keywords:Noise, Low-dimensional chaos
Issue Date:2001
Publisher:EDP Sciences
Citation:Europhysics Letters 56: 347 (2001)
Abstract:We show that it is possible for chaotic systems to display the main features of coherence resonance. In particular, we show that a Chua model, operating in a chaotic regime and in the presence of noise, can exhibit oscillations whose regularity is optimal for some intermediate value of the noise intensity. We find that the power spectrum of the signal develops a peak at finite frequency at intermediate values of the noise. These are all signatures of coherence resonance. We also experimentally study a Chua circuit and corroborate the above simulation results. Finally, we analyze a simple model composed of two separate limit cycles which still exhibits coherence resonance, and show that its behavior is qualitatively similar to that of the chaotic Chua system.
Description:PACS. 05.40.Ca – Noise. PACS. 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems. PACS. 05.45.Ac – Low-dimensional chaos.
Publisher version (URL):http://dx.doi.org/10.1209/epl/i2001-00526-5
E-ISSNmetadata.dc.identifier.doi = DOI:1286-4854
Appears in Collections:(IMEDEA) Artículos

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