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Título: | Front interaction induces excitable behavior |
Autor: | Parra-Rivas, P. CSIC ORCID; Matías, Manuel A. CSIC ORCID ; Colet, Pere CSIC ORCID ; Gelens, Lendert CSIC ORCID; Walgraef, Daniel CSIC ORCID; Gomila, Damià CSIC ORCID | Fecha de publicación: | 23-feb-2017 | Editor: | American Physical Society | Citación: | Physical Review - Section E - Statistical Nonlinear and Soft Matter Physics 95(2): 020201(R) (2017) | Resumen: | Spatially extended systems can support local transient excitations in which just a part of the system is excited. The mechanisms reported so far are local excitability and excitation of a localized structure. Here we introduce an alternative mechanism based on the coexistence of two homogeneous stable states and spatial coupling. We show the existence of a threshold for perturbations of the homogeneous state. Subthreshold perturbations decay exponentially. Superthreshold perturbations induce the emergence of a long-lived structure formed by two back to back fronts that join the two homogeneous states. While in typical excitability the trajectory follows the remnants of a limit cycle, here reinjection is provided by front interaction, such that fronts slowly approach each other until eventually annihilating. This front-mediated mechanism shows that extended systems with no oscillatory regimes can display excitability. | Versión del editor: | https://doi.org/10.1103/PhysRevE.95.020201 | URI: | http://hdl.handle.net/10261/173174 | DOI: | 10.1103/PhysRevE.95.020201 | ISSN: | 1539-3755 | E-ISSN: | 1550-2376 |
Aparece en las colecciones: | (IFISC) Artículos |
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front_interaction.pdf | 347,56 kB | Adobe PDF | Visualizar/Abrir |
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