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Universal computation in excitable media: the 2 + medium

✍ Scribed by Andrew I. Adamatzky

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
171 KB
Volume
7
Category
Article
ISSN
1616-301X

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✦ Synopsis

In this paper we address the problem of how to build a universal computer in an excitable medium. We construct a cellular automata model of a two-dimensional excitable medium (the 2 + medium) evolving in discrete time, with the following properties: every element of the medium has three states (rest, excited and refractory); an element interacts with the eight closest elements; an element in the rest state becomes excited only if exactly two of its eight neighbours are excited. To prove that the 2 + medium is a minimal cellular automata model of a physical universal computing system, we design the minimal logical gates NOT, AND and NOT-AND. *

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