title: Novel type of chimera spiral waves arising from decoupling of a diffusible component.
abstract: Spiral waves composed of coherent traveling waves surrounding a core containing stochastically distributed stationary areas are found in numerical simulations of a three-variable reaction-diffusion system with one diffusible species. In the spiral core, diffusion of this component (w) mediates transitions between dynamic states of the subsystem formed by the other two components, whose dynamics is more rapid than that of w. Diffusive coupling between adjacent sites can be "on" or "off" depending on the subsystem state. The incoherent structures in the spiral core are produced by this decoupling of the slow diffusive component from the fast non-diffusing subsystem. The phase diagram reveals that the region of incoherent behavior in chimera spirals grows drastically, leading to modulation and breakup of the spirals, in the transition zones between 1(n-1) and 1(n) local mixed-mode oscillations.
authors.affiliation: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Tang
authors.affiliation: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yang
authors.affiliation: Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110, USA.
authors.forename: Irving R
authors.initials: IR
authors.lastname: Epstein
authors.affiliation: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Yuemin
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Qingyu
authors.initials: Q
authors.lastname: Gao