Noise-induced spatial periodicity in excitable chemical media

Abstract We show that spatiotemporal noise acting on the illumination intensity of an excitable photosensitive Belousov–Zhabotinskii medium, modelled by the diffusively coupled two-component Oregonator kinetics, is able to extract a characteristic spatial frequency of the system in a resonant manner. We emphasize that thereby the system is locally initiated from steady state excitable conditions so the observed patterns are exclusively noise induced. Thus, the reported phenomenon is a novel observation of spatial coherence resonance in excitable chemical media.

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