Experimental logical gates in a reaction-diffusion medium: The XOR gate and beyond
Abstract
We exploit the particulars of diffusive wave front interactions in certain types of two-reactant reaction-diffusion medium to construct a laboratory prototype of an XOR gate. In the design, the values of the logic variables are represented by the presence or absence of a precipitate, ``wires'' are constructed of a substrate loaded gel, and the computation is based on diffusive wave dynamics. We also discuss implementation of AND gate and study a three-valued composition, derived from the gate dynamic, and discuss possible logics that could be derived from this composition.
- Publication:
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Physical Review E
- Pub Date:
- October 2002
- DOI:
- Bibcode:
- 2002PhRvE..66d6112A
- Keywords:
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- 82.40.Ck;
- 89.75.Kd;
- 89.75.Fb;
- 89.20.Ff;
- Pattern formation in reactions with diffusion flow and heat transfer;
- Patterns;
- Structures and organization in complex systems;
- Computer science and technology