Noise-sustained pulsating patterns and global oscillations in subexcitable media

被引：122

作者：

Hempel, H

Schimansky-Geier, L

García-Ojalvo, J

机构：

[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany

[2] Univ Politecn Cataluna, Dept Fis & Engn Nucl, E-08222 Terrassa, Spain

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.82.3713

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The constructive role of noise in an excitable activator-inhibitor medium is analyzed. Noise acts parametrically on the excitation threshold of the system, and is seen to support the existence of pulsating spots in the subexcitable regime. Increasing values of the noise intensity in this regime lead to a collective state in which all the elements of the system fire synchronously. The spectral characteristics of the resulting global oscillations are also studied as a function of the noise intensity, showing the typical fingerprint of stochastic resonance. [S0031-9007(99)09016-X].

引用

页码：3713 / 3716

页数：4

共 25 条

[1] Model of global spontaneous activity and local structured activity during delay periods in the cerebral cortex [J].