title: Resonant drift of two-armed spirals by a periodic advective field and periodic modulation of excitability.
abstract: 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.
authors.affiliation: Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou, China.
authors.forename: Ling-Yun
authors.initials: LY
authors.lastname: Deng
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: You-Quan
authors.initials: YQ
authors.lastname: Li