title: Array-enhanced coherence resonance and phase synchronization in a two-dimensional array of excitable chemical oscillators.
abstract: We investigate the spatiotemporal dynamics in a two-dimensional array of excitable elements subjected to independent external noise, where elements are prepared by localizing the Belousov-Zhabotinsky reaction in a gel matrix. We experimentally demonstrate that the coherence of noise-induced firings is improved with increasing the array size, i.e., the occurrence of array-enhanced coherence resonance. Furthermore, it is found that synchronization among oscillators which are barely coupled can be achieved via coherence resonance. Experimental observations are approximately reproduced in a numerical simulation with a forced Oregonator reaction-diffusion model.
authors.affiliation: Department of Applied Physics, Fukuoka University, Fukuoka 814-0180, Japan.
authors.forename: Taiji
authors.initials: T
authors.lastname: Okano
authors.forename: Akane
authors.initials: A
authors.lastname: Kitagawa
authors.forename: Kenji
authors.initials: K
authors.lastname: Miyakawa