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Pulse trains propagating through excitable media subjected to external noise |
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| Authors: | V Beato H Engel L Schimansky-Geier |
| Institution: | 1.Technische Universit?t Berlin, Institut für Theoretische Physik,Berlin,Germany;2.Università “La Sapienza” di Roma,Roma,Italy;3.Humboldt-Universit?t zu Berlin, Institut für Physik,Berlin,Germany |
| 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. |
| Keywords: | 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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