title: Spiral wave dynamics under feedback derived from a confined circular domain.
abstract: Spiral waves are induced in a thin layer of the light-sensitive Belousov-Zhabotinsky reaction and controlled by a time-dependent uniform illumination. The intensity of the illumination is taken to be proportional to the average wave activity observed within a circular domain of the reaction layer. Stabilization and destabilization of spiral waves, as well as the existence of additional types of attractors, are demonstrated. A simple mathematical description is proposed in order to explain the existence of the attractors and the dependence of their size on the time delay in the feedback loop.
authors.affiliation: Otto-von-Guericke-Universität, Institut für Experimentelle Physik, Universitätsplatz 2, D-39106 Magdeburg, Germany.
authors.forename: O U
authors.initials: OU
authors.lastname: Kheowan
authors.forename: C K
authors.initials: CK
authors.lastname: Chan
authors.forename: V S
authors.initials: VS
authors.lastname: Zykov
authors.forename: O
authors.initials: O
authors.lastname: Rangsiman
authors.forename: S C
authors.initials: SC
authors.lastname: Müller