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Regular wave propagation out of noise in chemical active media
Alonso Muñoz, Sergio; Sendiña Nadal, Irene; Pérez Muñuzuri, Vicente; Sancho, José M.; Sagués i Mestre, Francesc
Universitat de Barcelona
A pacemaker, regularly emitting chemical waves, is created out of noise when an excitable photosensitive Belousov-Zhabotinsky medium, strictly unable to autonomously initiate autowaves, is forced with a spatiotemporal patterned random illumination. These experimental observations are also reproduced numerically by using a set of reaction-diffusion equations for an activator-inhibitor model, and further analytically interpreted in terms of genuine coupling effects arising from parametric fluctuations. Within the same framework we also address situations of noise-sustained propagation in subexcitable media.
2010-06-10
Química física
Física estadística
Dinàmica de fluids
Chemistry, Physical and theoretical
Statistical physics
Fluid dynamics
(c) American Physical Society, 2001
Article
American Physical Society
         

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