title: The curious arithmetic of optical vortices.
abstract: The superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the individual beams. We report the experimental observation of this phenomenon.
authors: G
authors: G
authors: Molina-Terriza
authors: J
authors: J
authors: Recolons
authors: L
authors: L
authors: Torner