Noise-enhanced phase locking in a chemical oscillator system

被引：30

作者：

Miyakawa, Kenji ^{[1
,2
]}

Isikawa, Hironobu ^{[1
]}

机构：

[1] Department of Applied Physics, Fukuoka University, Fukuoka 814-0180, Japan

[2] Advanced Materials Institute, Fukuoka University, Fukuoka 814-0180, Japan

来源：

| 2002年 / American Physical Society卷 / 65期

关键词：

Acoustic noise - Composition - Computer simulation - Electric fields - Electrodes - Parameter estimation - Stochastic control systems - Threshold elements;

D O I：

10.1103/PhysRevE.65.056206

中图分类号：

学科分类号：

摘要：

Dynamical responses of a chemical oscillator to an external electric field were investigated in the Belousov-Zabotinsky reaction system with the catalyst Ru(bpy)32+ [tris-(2,2′-bipyridine) ruthenium (II)] immobilized in cation exchange beads. Periodic forcing above the threshold induced phase locking, whose synchronization region has a shape similar to the Arnold tongue. When a certain amount of noise together with a subthreshold periodic signal was imposed on the chemical oscillator, 1:1 phase locking to the periodic signal occurred. Its degree passed through a maximum with increase in the noise intensity, a manifestation of stochastic resonance in the form of noise-enhanced phase locking. The experimentally observed features were reproduced in a numerical simulation with a forced Oregonator reaction-diffusion model. © 2002 The American Physical Society.

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