title: Scroll waves pinned to moving heterogeneities.
abstract: Three-dimensional excitable systems can self-organize vortex patterns that rotate around one-dimensional phase singularities called filaments. In experiments with the Belousov-Zhabotinsky reaction and numerical simulations, we pin these scroll waves to translating inert cylinders and demonstrate the controlled repositioning of their rotation centers. If the pinning site extends only along a portion of the filament, the phase singularity is stretched out along the trajectory of the heterogeneity, which effectively writes the singularity into the system. Its trailing end point follows the heterogeneity with a lower velocity. This velocity, its dependence on the placement of the anchor, and the shape of the filament are explained by a curvature flow model.
authors: Florida State University, Department of Chemistry and Biochemistry, Tallahassee, Florida 32306-4390 USA.
authors: Hua
authors: H
authors: Ke
authors: Florida State University, Department of Chemistry and Biochemistry, Tallahassee, Florida 32306-4390 USA.
authors: Zhihui
authors: Z
authors: Zhang
authors: Florida State University, Department of Chemistry and Biochemistry, Tallahassee, Florida 32306-4390 USA.
authors: Oliver
authors: O
authors: Steinbock