title: Pattern formation by interacting chemical fronts.
abstract: Experiments on a bistable chemical reaction in a continuously fed thin gel layer reveal a new type of spatiotemporal pattern, one in which fronts propagate at a constant speed until they reach a critical separation (typically 0.4 millimeter) and stop. The resulting asymptotic state is a highly irregular stationary pattern that contrasts with the regular patterns such as hexagons, squares, and stripes that have been observed in many nonequilibrium systems. The observed patterns are initiated by a finite amplitude perturbation rather than through spontaneous symmetry breaking.
authors.forename: K J
authors.initials: KJ
authors.lastname: Lee
authors.forename: W D
authors.initials: WD
authors.lastname: McCormick
authors.forename: Q
authors.initials: Q
authors.lastname: Ouyang
authors.forename: H L
authors.initials: HL
authors.lastname: Swinney