STATISTICS OF TOPOLOGICAL DEFECTS AND SPATIOTEMPORAL CHAOS IN A REACTION-DIFFUSION SYSTEM

Citation
M. Hildebrand et al., STATISTICS OF TOPOLOGICAL DEFECTS AND SPATIOTEMPORAL CHAOS IN A REACTION-DIFFUSION SYSTEM, Physical review letters, 75(8), 1995, pp. 1503-1506
Citations number
21
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
75
Issue
8
Year of publication
1995
Pages
1503 - 1506
Database
ISI
SICI code
0031-9007(1995)75:8<1503:SOTDAS>2.0.ZU;2-U
Abstract
The transition between rotating spirals and spatiotemporal chaos (''sp iral turbulence'') in an excitable reaction-diffusion system is invest igated by means of statistics of topological defects of the concentrat ion field. The ratio of the variance and the mean value of the number of defects show a significant deviation from unity at this point. A ch ange of the defect dynamics within the turbulent regime reveals a stro ng similarity to a liquid-to-gas transition, while a liquid-solid-like transition occurs upon a jumplike return to the region of spiral stab ility.