title: Spiral wave chimeras in locally coupled oscillator systems.
abstract: The recently discovered chimera state involves the coexistence of synchronized and desynchronized states for a group of identical oscillators. In this work, we show the existence of (inwardly) rotating spiral wave chimeras in the three-component reaction-diffusion systems where each element is locally coupled by diffusion. A transition from spiral waves with the smooth core to spiral wave chimeras is found as we change the local dynamics of the system or as we gradually increase the diffusion coefficient of the activator. Our findings on the spiral wave chimera in the reaction-diffusion systems suggest that spiral chimera states may be found in chemical and biological systems that can be modeled by a large population of oscillators indirectly coupled via a diffusive environment.
authors.affiliation: Department of Physics, Hangzhou Normal University, Hangzhou 310036, China.|Department of Physics and Astronomy, Ghent University, Krijgslaan 281, 9000 Gent, Belgium.
authors.forename: Bing-Wei
authors.initials: BW
authors.lastname: Li
authors.affiliation: Department of Physics and Astronomy, Ghent University, Krijgslaan 281, 9000 Gent, Belgium.
authors.forename: Hans
authors.initials: H
authors.lastname: Dierckx
mesh_terms: D004058:Diffusion; D008962:Models, Theoretical