Coherence Resonance in a Noise-Driven Excitable System

Arkady S. Pikovsky and Jürgen Kurths
Phys. Rev. Lett. 78, 775 – Published 3 February 1997
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Abstract

We study the dynamics of the excitable Fitz Hugh–Nagumo system under external noisy driving. Noise activates the system producing a sequence of pulses. The coherence of these noise-induced oscillations is shown to be maximal for a certain noise amplitude. This new effect of coherence resonance is explained by different noise dependencies of the activation and the excursion times. A simple one-dimensional model based on the Langevin dynamics is proposed for the quantitative description of this phenomenon.

  • Received 9 August 1996

DOI:https://doi.org/10.1103/PhysRevLett.78.775

©1997 American Physical Society

Authors & Affiliations

Arkady S. Pikovsky and Jürgen Kurths

  • Max–Planck–Arbeitsgruppe “Nichtlineare Dynamik” an der Universität Potsdam Am Neuen Palais 19, PF 601553, D-14415, Potsdam, Germany

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Issue

Vol. 78, Iss. 5 — 3 February 1997

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