title: Phase-locked scroll waves defy turbulence induced by negative filament tension.
abstract: Scroll waves in a three-dimensional media may develop into turbulence due to negative tension of the filament. Such negative tension-induced instability of scroll waves has been observed in the Belousov-Zhabotinsky reaction systems. Here we propose a method to restabilize scroll wave turbulence caused by negative tension in three-dimensional chemical excitable media using a circularly polarized (rotating) external field. The stabilization mechanism is analyzed in terms of phase-locking caused by the external field, which makes the effective filament tension positive. The phase-locked scroll waves that have positive tension and higher frequency defy the turbulence and finally restore order. A linear theory for the change of filament tension caused by a generic rotating external field is presented and its predictions closely agree with numerical simulations.
authors: Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors: Teng-Chao
authors: TC
authors: Li
authors: School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
authors: Xiang
authors: X
authors: Gao
authors: Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors: Fei-Fei
authors: FF
authors: Zheng
authors: Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China.
authors: Mei-Chun
authors: MC
authors: Cai
authors: Department of Physics, Hangzhou Normal University, Hangzhou 310036, China.
authors: Bing-Wei
authors: BW
authors: Li
authors: Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors: Hong
authors: H
authors: Zhang
authors: Department of Physics and Astronomy, Ghent University, Krijgslaan 281, 9000 Gent, Belgium.
authors: Hans
authors: H
authors: Dierckx
mesh_terms: D003198:Computer Simulation; D055590:Electromagnetic Phenomena; D008962:Models, Theoretical; D009038:Motion; D010507:Periodicity