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- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 2002 The American Physical Society
- ISSN
- 1095-3787
- DOI
- 10.1103/PhysRevE.66.046204
- pmid
- 12443296
- Publisher site
- See Article on Publisher Site
Abstract
Dynamics of an excitable Belousov-Zabotinsky reaction system under an external noise are investigated using cation exchange beads loaded with the cationic catalyst. When a noise amplitude is increased above a certain value, an oscillatory state appears. It is shown that the coherence of these noise-excited oscillations is maximal for a suitable value of the noise amplitude. This phenomenon is characterized by using various statistical measures, such as the signal-to-noise ratio in the power spectrum, the correlation time of the noise-excited oscillation, and the standard deviation of time intervals between successive firing events. We find the experimental evidence that the period of coherent oscillation is determined by a characteristic time scale of the system.
Journal
Physical Review E – American Physical Society (APS)
Published: Oct 1, 2002