Journal ArticleDOI
Stochastic resonance in extended bistable systems: the role of potential symmetry.
Sebastián Bouzat,Horacio S. Wio +1 more
TLDR
The role of potential symmetry is studied in a three-field reaction-diffusion system presenting bistability by means of a two-state theory for stochastic resonance in general asymmetric systems, indicating that it is this feature which governs the optimization of the system's response to periodic signals.Abstract:
We study the role of potential symmetry in a three-field reaction-diffusion system presenting bistability by means of a two-state theory for stochastic resonance in general asymmetric systems. By analyzing the influence of different parameters in the optimization of the signal-to-noise ratio, we observe that this magnitude always increases with the symmetry of the system's potential, indicating that it is this feature which governs the optimization of the system's response to periodic signals.read more
Citations
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Journal ArticleDOI
Array-enhanced coherence resonance: nontrivial effects of heterogeneity and spatial independence of noise.
TL;DR: The effect of coherence resonance in a heterogeneous array of coupled Fitz Hugh-Nagumo neurons is demonstrated and it is shown that coupling of such elements leads to a significantly stronger coherence compared to that of a single element.
Journal ArticleDOI
Enhancement of stochastic resonance: the role of non Gaussian noises
TL;DR: In this paper, the authors analyzed the phenomenon of stochastic resonance in a double well potential driven by a colored non Gaussian noise and obtained a consistent Markovian approximation that enables them to get, through two state theory, analytical expressions for the signal-to-noise ratio, finding an enhancement of this quantity when the system departs from Gaussian behavior.
Journal ArticleDOI
Effect of non-Gaussian noise sources in a noise-induced transition
Horacio S. Wio,Raúl Toral +1 more
TL;DR: In this paper, the authors study a noise-induced transition when the system is driven by a noise source taken as colored and non-Gaussian, and show that there is a shift of the transition as the noise departs from the Gaussian behavior.
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Oscillatory amplification of stochastic resonance in excitable systems.
TL;DR: In systems which combine both oscillatory and excitable properties, and hence intrinsically possess two internal frequencies, the effect of stochastic resonance can be amplified by application of an additional high-frequency signal, which is in resonance with the oscillatory frequency.
Journal ArticleDOI
Impact of time delays on stochastic resonance in an ecological system describing vegetation
TL;DR: In this paper, the authors investigated the stochastic resonance phenomenon in a vegetation ecological system with time delay, at which the vegetation dynamics is disturbed by both intrinsic and extrinsic noises.