Document Detail


Noise-induced excitability in oscillatory media.
MedLine Citation:
PMID:  14611273     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A noise-induced phase transition to excitability is reported in oscillatory media with FitzHugh-Nagumo dynamics. This transition takes place via a noise-induced stabilization of a deterministically unstable fixed point of the local dynamics, while the overall phase-space structure of the system is maintained. Spatial coupling is required to prevent oscillations through suppression of fluctuations (via clustering in the case of local coupling). Thus, the joint action of coupling and noise leads to a different type of phase transition and results in a stabilization of the system. The resulting regime is shown to display characteristic traits of excitable media, such as stochastic resonance and wave propagation. This effect thus allows the transmission of signals through an otherwise globally oscillating medium.
Authors:
E Ullner; A Zaikin; J García-Ojalvo; J Kurths
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-10-31
Journal Detail:
Title:  Physical review letters     Volume:  91     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-11-12     Completed Date:  2003-12-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  180601     Citation Subset:  IM    
Affiliation:
Institut für Physik, Potsdam Universität, Am Neuen Palais 10, D-14469 Potsdam, Germany.
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MeSH Terms
Descriptor/Qualifier:
Models, Biological
Models, Theoretical*
Noise*

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