Experimental implementation of collision-based gates in Belousov-Zhabotinsky medium
de Lacy Costello, B. and Adamatzky, A. (2005) Experimental implementation of collision-based gates in Belousov-Zhabotinsky medium. Chaos, Solitons & Fractals, 25 (3). pp. 535-544. ISSN 0960-0779
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Publisher's URL: http://dx.doi.org/10.1016/j.chaos.2004.11.056
This paper details a novel chemical system based around the Belousov Zhabotinsky reaction. By immobilising the catalyst for the reaction on photographic paper you are able to obtain a sub-excitable version of the reaction. In this sub-excitable reaction small semi-stable fragments of excitation proliferate. In the paper these fragments undergo a number of types of collisions which are interpreted in terms of logical gates. This paper offers the first practical implementation of logical gates constructed in an unconstrained chemical medium. Previous papers in the field simply utilised waves of excitation travelling along stationary "wires". The results in this paper were largely reproduced in the writing of a New Scientist feature article on the authors work (26 March 2005 issue pages 32-36).