title: Observing quantum correlation of photons in Laguerre-Gauss modes using the Gouy phase.
abstract: The effect of the Gouy phase, which is one of the geometrical phases of photons, is observed through quantum correlation in Laguerre-Gaussian (LG) modes. In an experiment, the relative phase of two different LG modes of measurement basis states is manipulated via the Gouy phase, and the observed coincidence count rates agree well with theoretical predictions. This result suggests that the Gouy phase can be used as a new tool to manipulate multidimensional photonic quantum states.
authors.affiliation: Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Kawase
authors.forename: Yoko
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Takeda
authors.forename: Keiji
authors.initials: K
authors.lastname: Sasaki
authors.forename: Shigeki
authors.initials: S
authors.lastname: Takeuchi