Noise-enhanced phase locking in a chemical oscillator system.
Noise-enhanced phase locking in a chemical oscillator system.
复制标题
化学振荡器系统中的噪声增强锁相。
DOI：
10.1103/physreve.65.056206
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Hironobu Isikawa
中科院分区：
文献类型：
--
作者：
K. Miyakawa;Hironobu Isikawa
研究了在阳离子交换小球中固载催化剂Ru（bpy）（3）（2+）[tris-（2，2（'）-bipyridine）ruthenium（II）]的Belousov-Zabotinsky反应体系中化学振荡器对外电场的动力学响应.高于阈值的周期性强迫引起锁相，其同步区域具有类似于Arnold舌的形状。当一定量的噪声与亚阈值周期信号一起施加在化学振荡器上时，发生对周期信号的1：1锁相。其程度通过一个最大值与噪声强度的增加，表现为随机共振的形式噪声增强锁相。实验观察到的功能再现在数值模拟与强制Oregonator反应扩散模型。
Dynamical responses of a chemical oscillator to an external electric field were investigated in the Belousov-Zabotinsky reaction system with the catalyst Ru(bpy)(3)(2+) [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.