Coherence resonance in an excitable system with time delay

被引：20
|
作者：
Sethia, Gautam C. [1 ]
Kurths, Juergen
Sen, Abhijit
机构：
[1] Inst Plasma Res, Bhat 382428, Gandhinagar, India
[2] Univ Potsdam, Inst Phys, D-14415 Potsdam, Germany
来源：
PHYSICS LETTERS A | 2007年 / 364卷 / 3-4期
关键词：
coherence resonance; excitable system; time delayed feedback;
D O I：
10.1016/j.physleta.2006.11.089
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the noise activated dynamics of a model excitable system that consists of a subcritical Hopf oscillator with a time delayed nonlinear feedback. The coherence of the noise driven pulses of the system exhibits a novel double peaked structure as a function of the noise amplitude. The two peaks correspond to separate optimal noise levels for excitation of single spikes and multiple spikes (bursts) respectively. The relative magnitudes of these peaks are found to be a sensitive function of time delay. The physical significance of our results and its practical implications in various real life systems are discussed. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：227 / 230
页数：4
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