Resonant drift of two-armed spirals by a periodic advective field and periodic modulation of excitability.
The drift behavior of two-armed spirals induced by periodic advective field and periodic modulation of excitability is investigated. It is shown that the two-armed spirals controlled by periodic advective field and periodic modulation of excitability drift in completely different ways. For periodic advective field, the two tips of the two-armed spiral drift in the same direction and the two-armed spiral is stable. While for periodic modulation of excitability, the two tips drift in the opposite direction and the two-armed spiral splits into two single-armed spirals. Analytical results based on a kinematic theory of rotating spirals in weakly excitable media are consistent with the numerical results.
Deng
Ling-Yun
LY
Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou, China.
Zhang
Hong
H
Li
You-Quan
YQ