Suppression of spirals and turbulence in inhomogeneous excitable media

Jiang-Xing Chen, Jun-Wen Mao, Bambi Hu, Jiang-Rong Xu, Ya-Feng He, Yuan Li, and Xiao-Ping Yuan

Phys. Rev. E 79, 066209 – Published 22 June 2009

Abstract

Suppression of spiral and turbulence in inhomogeneous media due to local heterogeneity with higher excitability is investigated numerically. When the inhomogeneity is small, control tactics by boundary periodic forcing (BPF) is effective against the existing spiral and turbulence. When the inhomogeneity of excitability is large, a rotating electric field (REF) is utilized to “smooth” regional heterogeneity based on driven synchronization. Consequently, a control approach combining BPF with REF is proposed to suppress the spiral and turbulence. The underlying mechanism of successful suppression is discussed in terms of dispersion relation.

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Received 30 October 2008

DOI:https://doi.org/10.1103/PhysRevE.79.066209

Authors & Affiliations

Jiang-Xing Chen^1,2,*, Jun-Wen Mao^2,3, Bambi Hu^2,4, Jiang-Rong Xu¹, Ya-Feng He², Yuan Li¹, and Xiao-Ping Yuan¹

¹Department of Physics, HangZhou Dianzi University, Hangzhou 310018, China
²Department of Physics, Centre for Nonlinear Studies, and The Beijing-Hong Kong-Singapore Joint Centre for Nonlinear and Complex Systems (Hong Kong), Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
³Department of Physics, HuZhou Teachers College, HuZhou 313000, China
⁴Department of Physics, University of Houston, Houston, Texas 77204-5005, USA

^*jxchen@hdu.edu.cn

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Issue

Vol. 79, Iss. 6 — June 2009

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