title: Phototaxis of spiral waves.
abstract: The drift of spiral waves toward regions of higher light intensity was observed experimentally in the ruthenium-catalyzed Belousov-Zhabotinsky reaction. A light gradient can thus be used to manipulate optical information in new computational systems based on photochemical media. The drift of a gradient that is rotationally invariant in space is three to four times as fast as that of a translationally invariant gradient. Simulations based on the use of a cellular automaton, which is made isotropic by a semirandom distribution of cells, are in agreement with the experimental results.
authors.forename: M
authors.initials: M
authors.lastname: Markus
authors.forename: Z
authors.initials: Z
authors.lastname: Nagy-Ungvarai
authors.forename: B
authors.initials: B
authors.lastname: Hess