Analog Reaction-Diffusion Chip Imitating Belousov-Zhabotinsky Reaction with Hardware Oregonator Model

We introduce analog integrated circuits that imitate a typical model of a reaction diffusion system, called the Belousov-Zhabotinsky (BZ) reaction. The BZ reaction gives us many insights into developing new architectures based on a new computing paradigm such as in active wave computing. The analog unit circuit exhibits both excitatory and oscillatory behaviors with very stiff responses, as observed in typical BZ reactions. Spatiotemporal behaviors of an array of unit circuits, including synchronization of cell circuits and production of traveling waves, are demonstrated through both circuit simulation and experiments on the fabricated chip.