title: Spatiotemporal patterns and symmetry breaking on a ring electrode.
abstract: A series of experiments on a ring electrode with changes in a parameter, the applied potential, are described. Spatiotemporal patterns are investigated in a region of parameter space in which relaxation oscillations occur. The simplest state is a period 2Pi oscillation that has full O(2) symmetry so that at each instant the pattern is unchanged by rotations or reflections of the ring. With change in parameter a spatiotemporal period doubling occurs to period 4Pi. This is followed by a symmetry breaking to another state with period 4Pi and subsequently by a second period doubling to period 8Pi. Proper orthogonal decomposition is used as an aid in elucidating the nature of the transitions.
authors: Department of Chemical Engineering, University of Virginia, 102 Engineers' Way, Charlottesville, Virginia 22904-4741, USA.
authors: B J
authors: BJ
authors: Green
authors: J L
authors: JL
authors: Hudson