https://doi.org/10.1140/epjb/e2007-00228-x
Pulse trains propagating through excitable media subjected to external noise
1
Technische Universität Berlin, Institut für Theoretische Physik, Hardenbergstr. 36, 10623, Berlin, Germany
2
Università “La Sapienza” di Roma, P.le Aldo Moro 2, 00185 Roma, Italy
3
Humboldt-Universität zu Berlin, Institut für Physik, Invalidenstr. 110, 10115 Berlin, Germany
Corresponding author: a valentina.beato@roma1.infn.it
Received:
9
January
2007
Revised:
17
July
2007
Published online:
8
September
2007
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
