title: Novel type of amplitude spiral wave in a two-layer system.
abstract: Interaction of spiral waves in a two-layer system described by a model of coupled complex Ginzburg-Landau equations with negative-feedback couplings ε(1) and ε(2) is studied. Synchronization of two spiral waves can be broadly found if ε(1)+ε(2) is sufficiently large. Prior to the synchronization, under the condition of strongly asymmetric coupling (∣ε(1)-ε(2)∣≫0), a novel type of spiral wave, amplitude spiral wave, exists in the driven system. The pattern of amplitude spiral wave shows the spiral in the amplitude and without a singularity point (tip), compared to usual spiral waves known for phase with amplitude uniform far away from tips and rotating around tips.
authors.affiliation: Shenzhen Key Laboratory of Special Functional Materials, College of Materials, Shenzhen University, Shenzhen 518060, China.
authors.forename: Jihua
authors.initials: J
authors.lastname: Gao
authors.forename: Lingling
authors.initials: L
authors.lastname: Xie
authors.forename: Haichun
authors.initials: H
authors.lastname: Nie
authors.forename: Meng
authors.initials: M
authors.lastname: Zhan