Wave initiation through spatiotemporally controllable perturbations

We study the initiation of pulses and fronts in a two-dimensional catalytic reaction-diffusion system: CO oxidation on Pt(110). Using a computer-controlled mobile focused laser beam, we impart various patterns (in space and time) of localized temperature "kicks" to the surface. We explore,...

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Bibliographic Details
Published in:Physical review letters 2003-04, Vol.90 (14), p.148301-148301, Article 148301
Main Authors: Wolff, J, Papathanasiou, A G, Rotermund, H H, Ertl, G, Katsoulakis, M A, Li, X, Kevrekidis, I G
Format: Article
Language:English
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Summary:We study the initiation of pulses and fronts in a two-dimensional catalytic reaction-diffusion system: CO oxidation on Pt(110). Using a computer-controlled mobile focused laser beam, we impart various patterns (in space and time) of localized temperature "kicks" to the surface. We explore, and also rationalize through modeling, the cooperativity of such individually subcritical perturbations in both the excitable and the bistable regime.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.90.148301