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Control of noise-induced coherent behaviors in an array of excitable elements by time-delayed feedback.

Authors
  • Okano, Taiji
  • Miyakawa, Kenji
Type
Published Article
Journal
Physical Review E
Publisher
American Physical Society (APS)
Publication Date
Aug 01, 2010
Volume
82
Issue
2 Pt 2
Pages
27202–27202
Identifiers
PMID: 20866942
Source
Medline
License
Unknown

Abstract

We investigate feedback-controlled coherent dynamics in a two-dimensional array of excitable elements. We demonstrate that one can freely enhance or reduce the spatiotemporal coherence of noise-induced oscillation, such as coherence resonance and phase synchronization, by controlling both the delay time and the feedback gain. Furthermore, we find that noise-induced oscillations are entrained by the feedback force in a certain range of the delay time. Experimental observations are approximately reproduced in a numerical simulation with a forced Oregonator model.

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