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Domains containing spiral waves form on a stationary background in a photosensitive Belousov-Zhabotinsky reaction with light-induced alternating nonlocal feedback. Complex behavior of colliding and splitting wave fragments is found with feedback radii comparable to the spiral wavelength. A linear stability analysis of the uniform stationary states in an Oregonator model reveals a spatial symmetry breaking instability. Numerical simulations show behavior in agreement with that found experimentally and also predict a variety of other new patterns.

Source Citation

Hildebrand, M.., Skødt, H.., & Showalter, K.. (2001). Spatial Symmetry Breaking In The Belousov-Zhabotinsky Reaction With Light-Induced Remote Communication. Physical Review Letters, 87(8).