title: Oscillatory clusters in the periodically illuminated, spatially extended Belousov-Zhabotinsky reaction.
abstract: Cluster-cluster transitions in the periodically illuminated photosensitive Belousov-Zhabotinsky (BZ) reaction-diffusion system exhibit the same scenario as in the autonomous BZ system with negative global feedback: two-phase clusters <--> three-phase clusters <--> irregular clusters <--> localized clusters. Transitions induced by changing the dark ( TD) or light ( TL) phases of the periodic external square wave illumination are dependent not only on the frequency of illumination at constant TD/TL, but also on the ratio TD/TL at constant frequency (when TD+TL = const).
authors.affiliation: Department of Chemistry and Volen Center for Complex Systems, Brandeis University, MS 015, Waltham, Massachusetts 02454-9110, USA.
authors.forename: V K
authors.initials: VK
authors.lastname: Vanag
authors.forename: A M
authors.initials: AM
authors.lastname: Zhabotinsky
authors.forename: I R
authors.initials: IR
authors.lastname: Epstein