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Experimental validation of binary collisions between wave fragments in the photosensitive Belousov–Zhabotinsky reaction

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  • Toth, Rita
  • Stone, Christopher
  • Adamatzky, Andrew
  • de Lacy Costello, Ben
  • Bull, Larry

Abstract

We present experimental verification of wave fragment collisions in the sub-excitable Belousov–Zhabotinsky medium observed previously in simulation [Adamatzky A, De Lacy Costello B. Binary collisions between wave fragments in a sub-excitable Belousov–Zhabotinsky medium. Chaos, Solitons & Fractals 2007;34:307–15]. We have reproduced in chemical experiments the majority of the collisions observed in simulation including annihilation, fusion and quasi-elastic types. The method we present is capable of implementing information transfer without any rigidly controlled architecture – fragments are simply introduced into an “arena” which consists of a large area of gel illuminated with a uniform light level – controlled at a level close to the sub-excitable threshold. Therefore, the fragments of excitation both pre and post collision possess a considerable freedom of movement when compared to previous implementations of information transfer in chemical systems. This chemical verification of previous theoretical results brings closer the possibility of utilising this phenomenon for implementing collision-based gates, signal tuning and programming of collision-based computers based upon excitable chemical reactions.

Suggested Citation

  • Toth, Rita & Stone, Christopher & Adamatzky, Andrew & de Lacy Costello, Ben & Bull, Larry, 2009. "Experimental validation of binary collisions between wave fragments in the photosensitive Belousov–Zhabotinsky reaction," Chaos, Solitons & Fractals, Elsevier, vol. 41(4), pages 1605-1615.
    • Handle: RePEc:eee:chsofr:v:41:y:2009:i:4:p:1605-1615
    DOI: 10.1016/j.chaos.2008.07.001
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    1. De Lacy Costello, Benjamin & Adamatzky, Andrew, 2005. "Experimental implementation of collision-based gates in Belousov–Zhabotinsky medium," Chaos, Solitons & Fractals, Elsevier, vol. 25(3), pages 535-544.
    2. Motoike, Ikuko N. & Adamatzky, Andrew, 2005. "Three-valued logic gates in reaction–diffusion excitable media," Chaos, Solitons & Fractals, Elsevier, vol. 24(1), pages 107-114.
    3. Adamatzky, Andrew & Costello, Benjamin de Lacy, 2007. "Binary collisions between wave-fragments in a sub-excitable Belousov–Zhabotinsky medium," Chaos, Solitons & Fractals, Elsevier, vol. 34(2), pages 307-315.
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    1. Adamatzky, Andrew & Holley, Julian & Bull, Larry & De Lacy Costello, Ben, 2011. "On computing in fine-grained compartmentalised Belousov–Zhabotinsky medium," Chaos, Solitons & Fractals, Elsevier, vol. 44(10), pages 779-790.

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