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The European Physical Journal B

, Volume 58, Issue 3, pp 323–329 | Cite as

Pulse trains propagating through excitable media subjected to external noise

  • V. BeatoEmail author
  • H. Engel
  • L. Schimansky-Geier
Statistical and Nonlinear Physics

Abstract.

We study the propagation of periodic pulse trains in excitable media exposed to external spatio-temporal noise using the light-sensitive Belousov-Zhabotinsky reaction with the underlying Oregonator model as representative example. In the weak noise approximation we find noise-induced transitions in the dispersion relation of pulse trains. We discuss noise-enhanced propagation of pulse trains within a certain wave-length range caused by external noise of moderate strength.

PACS.

05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion 82.40.Bj Oscillations, chaos, and bifurcations 47.54.-r Pattern selection; pattern formation 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  1. 1.Technische Universität Berlin, Institut für Theoretische PhysikBerlinGermany
  2. 2.Università “La Sapienza” di RomaRomaItaly
  3. 3.Humboldt-Universität zu Berlin, Institut für PhysikBerlinGermany

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