PhysRevLett.91.150601.pdf (568.19 kB)
Noise-sustained coherent oscillation of excitable media in a chaotic flow.
journal contribution
posted on 2023-06-08, 07:34 authored by Changsong Zhou, Jürgen Kurths, Zoltán Neufeld, Istvan KissConstructive 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.
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Physical Review LettersISSN
0031-9007External DOI
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15Volume
91Department affiliated with
- Mathematics Publications
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Article Number: 150601Full text available
- Yes
Peer reviewed?
- Yes
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2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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