Brownian motion of spiral waves driven by spatiotemporal structured noise |
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Authors: | Sendina-Nadal Alonso Perez-Munuzuri Gomez-Gesteira Perez-Villar Ramirez-Piscina Casademunt Sancho Sagues |
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Institution: | Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain. |
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Abstract: | Spiral chemical waves subjected to a spatiotemporal random excitability are experimentally and numerically investigated in relation to the light-sensitive Belousov-Zhabotinsky reaction. Brownian motion is identified and characterized by an effective diffusion coefficient which shows a rather complex dependence on the time and length scales of the noise relative to those of the spiral. A kinematically based model is proposed whose results are in good qualitative agreement with experiments and numerics. |
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