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Noise-enhanced excitability in bistable activator-inhibitor media

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dc.creator García Ojalvo, Jordi
dc.creator Sagués i Mestre, Francesc
dc.creator Sancho, José M.
dc.creator Schimansky-Geier, Lutz, 1950-
dc.date 2011-07-07T12:51:36Z
dc.date 2011-07-07T12:51:36Z
dc.date 2002
dc.date.accessioned 2024-12-16T10:27:21Z
dc.date.available 2024-12-16T10:27:21Z
dc.identifier 1539-3755
dc.identifier http://hdl.handle.net/2445/18736
dc.identifier 192337
dc.identifier.uri http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/22296
dc.description We show that external fluctuations induce excitable behavior in a bistable spatially extended system with activator-inhibitor dynamics of the FitzHugh-Nagumo type. This can be understood as a mechanism for sustained signal propagation in bistable media. The phase diagram of the stochastic system is analytically obtained and numerically verified. For small-noise intensities, front propagation becomes unstable, and excitable pulses arise as the only possible spatiotemporal behavior of the system. For large-noise intensities, on the other hand, the system enters an effective regime of oscillatory behavior, where it exhibits spontaneous nucleation of pulses and synchronized firing.
dc.format 6 p.
dc.format application/pdf
dc.language eng
dc.publisher The American Physical Society
dc.relation Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.65.011105
dc.relation Physical Review E, 2002, vol. 65, núm. 1, p. 011105-1-011105-6
dc.relation http://dx.doi.org/10.1103/PhysRevE.65.011105
dc.rights (c) The American Physical Society, 2002
dc.rights info:eu-repo/semantics/openAccess
dc.source Articles publicats en revistes (Física Quàntica i Astrofísica)
dc.subject Física estadística
dc.subject Termodinàmica
dc.subject Sistemes dinàmics diferenciables
dc.subject Biofísica
dc.subject Física mèdica
dc.subject Biological and medical physics
dc.subject Statistical physics
dc.subject Thermodynamics
dc.subject Differentiable dynamical systems
dc.subject Biophysics
dc.subject Medical physics
dc.title Noise-enhanced excitability in bistable activator-inhibitor media
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/publishedVersion


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