Noise-sustained coherent oscillations of excitable media in a chaotic flow

Zhou, C. S., Kurths, J., Neufeld, Z. and Kiss, I. Z. (2003) Noise-sustained coherent oscillations of excitable media in a chaotic flow. Physical Review Letters, 91 15: 150601.1-150601.4. doi:10.1103/PhysRevLett.91.150601

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Author Zhou, C. S.
Kurths, J.
Neufeld, Z.
Kiss, I. Z.
Title Noise-sustained coherent oscillations of excitable media in a chaotic flow
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2003
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.91.150601
Open Access Status File (Publisher version)
Volume 91
Issue 15
Start page 150601.1
End page 150601.4
Total pages 4
Publisher American Physical Society
Language eng
Abstract Constructive effects of noise in spatially extended systems have been well studied in static reaction-diffusion media. We study a noisy two-dimensional Fitz Hugh–Nagumo excitable model under the stirring of a chaotic flow. We find a regime where a noisy excitation can induce a coherent global excitation of the medium and a noise-sustained oscillation. Outside this regime, noisy excitation is either diluted into homogeneous background by strong stirring or develops into noncoherent patterns at weak stirring. These results explain some experimental findings of stirring effects in chemical reactions and are relevant for understanding the effects of natural variability in oceanic plankton bloom.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article no. 150601

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 28 Jun 2012, 12:47:42 EST by Zoltan Neufeld on behalf of Mathematics