title: Noise-sustained spiral waves: effect of spatial and temporal memory.
abstract: We have investigated the constructive roles of temporal noise, spatial disorder, and spatiotemporal fluctuation on the formation of spiral waves. Noise-sustained spiral waves are observed, the order of which passes a maximum with the increment of noise intensity, showing spatiotemporal coherent resonance. Moreover, we find that spatiotemporal fluctuation is much more favorable for the ordering process than temporal-noise only or spatial-disorder only. We demonstrate that this phenomenon shows the disadvantageous effect of spatial or temporal memory of noise.
authors.affiliation: Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China.
authors.forename: Zhonghuai
authors.initials: Z
authors.lastname: Hou
authors.forename: Houwen
authors.initials: H
authors.lastname: Xin