Frequency Enhancement in Coupled Noisy Excitable Elements

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52902

Title:	Frequency Enhancement in Coupled Noisy Excitable Elements
Authors:	Chiang,WY;Lai,PY;Chan,CK
Contributors:	物理學系
Keywords:	CARDIAC MYOCYTES;SUPRACHIASMATIC NUCLEUS;COHERENCE RESONANCE;SINOATRIAL NODE;FIBROBLASTS;SYNCHRONIZATION;CONTRACTION;FLUCTUATION;HEARTS
Date:	2011
Issue Date:	2012-06-11 10:49:01 (UTC+8)
Publisher:	國立中央大學
Abstract:	Oscillatory dynamics of coupled excitable FitzHugh-Nagumo elements in the presence of noise is investigated as a function of the coupling strength g. For two such coupled elements, their frequencies are enhanced and will synchronize at a frequency higher than the uncoupled frequencies of each element. As g increases, there is an unexpected peak in the frequency enhancement before reaching synchronization. The results can be understood with an analytic model based on the excitation across a potential barrier whose height is controlled by g. Simulation results of a coupled square lattice can quantitatively reproduce the unexpected peak in the variation of the beating rates observed in cultured cardiac cells experiments.
Relation:	PHYSICAL REVIEW LETTERS
Appears in Collections:	[Department of Physics] journal & Dissertation

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