Excitable chaos in diffusively coupled FitzHugh-Nagumo equations

G. Baier, M. Müller


A prototypic model of three coupled FitzHugh-Nagumo oscillators is shown to exhibit spatio-temporal hyperchaos. With increasing the number of coupled units the number of positive Lyapunov exponents increases. A system in two spatial dimensions shows two types of excitable spatio-temporal (hyper-)chaos depending on which variable is chosen for the coupling. Some implications for excitable cardiac tissue are discussed.


FitzHugh-Nagumo equation; hyperchaos; spatio-temporal chaos

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Revista Mexicana de Física

ISSN: 2683-2224 (on line), 0035-001X (print)

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