title: Spatial correlation singularity of a vortex field.
abstract: Experimental and numerical techniques allowed us to predict and verify the existence of a robust phase singularity in the spatial coherence function when a vortex is present. Though observed in the optical domain, this phenomenon may occur in any partially coherent vortex wave.
authors.affiliation: Optical Sciences Center, University of Arizona, Tucson, Arizona 85721, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Palacios
authors.forename: I D
authors.initials: ID
authors.lastname: Maleev
authors.forename: A S
authors.initials: AS
authors.lastname: Marathay
authors.forename: G A
authors.initials: GA
authors.lastname: Swartzlander