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Light sensitive Belousov-Zhabotinsky medium accommodates multiple logic gates.

Michail-Antisthenis Tsompanas1, Iosif-Angelos Fyrigos1, Vasileios Ntinas1

  • 1Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece.

Bio Systems
|May 25, 2021
PubMed
Summary
This summary is machine-generated.

Researchers demonstrated computational logic gates using the light-sensitive Belousov-Zhabotinsky (BZ) reaction. This chemical system, exhibiting wave propagation, proves Turing completeness for novel computing architectures beyond silicon.

Keywords:
Belousov–ZhabotinskyCellular AutomataChemical computingModelingSimulation

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Area of Science:

  • Chemical Computing
  • Biochemical Systems
  • Non-linear Dynamics

Background:

  • Computational functionality has been successfully implemented in living systems.
  • The Belousov-Zhabotinsky (BZ) reaction, known for its light sensitivity, offers a unique medium for chemical computation.
  • Previous work has explored collision-based techniques and light sensitivity for BZ reaction computation.

Purpose of the Study:

  • To investigate the computational capacity of a light-sensitive BZ medium.
  • To design and implement re-configurable logic gates within a fixed BZ reservoir.
  • To demonstrate the potential for unconventional computing architectures using chemical substrates.

Main Methods:

  • Utilized a Cellular Automata (CA)-based model of the Oregonator equations.
  • Simulated excitation and wave propagation on a light-sensitive BZ thin film.
  • Designed and tested basic logic gates (NOT, OR, AND) to establish Turing completeness.

Main Results:

  • Successfully implemented multiple logic gates (NOT, OR, AND) in a fixed BZ reservoir.
  • Demonstrated that all Boolean functions can be implemented by combining these logic gates, proving Turing completeness.
  • Investigated a more complex logic function to illustrate advanced capabilities of the BZ reservoir.

Conclusions:

  • The light-sensitive BZ reaction can perform computational functions, including basic logic gates.
  • The proposed architecture is Turing complete and capable of conventional (von Neumann) computation.
  • The chemical substrate shows promise for future unconventional computations like neuromorphic and fuzzy computing, potentially outperforming silicon.