Regular Wave Propagation Out of Noise in Chemical Active Media

Journal Article · Mon Aug 13 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.078302· OSTI ID:40230962

Alonso, S; Sendina-Nadal, I; Perez-Munuzuri, V; Sancho, J M; Sagues, F

A pacemaker, regularly emitting chemical waves, is created out of noise when an excitable photosensitive Belousov-Zhabotinsky medium, strictly unable to autonomously initiate autowaves, is forced with a spatiotemporal patterned random illumination. These experimental observations are also reproduced numerically by using a set of reaction-diffusion equations for an activator-inhibitor model, and further analytically interpreted in terms of genuine coupling effects arising from parametric fluctuations. Within the same framework we also address situations of noise-sustained propagation in subexcitable media.

• Sponsoring Organization: (US)
• OSTI ID: 40230962
• Journal Information: Physical Review Letters, Vol. 87, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.87.078302; Othernumber: PRLTAO000087000007078302000001; 001134PRL; PBD: 13 Aug 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FLUCTUATIONS
ILLUMINANCE
WAVE PROPAGATION