title: Hanbury Brown Twiss effect for ultracold quantum gases.
abstract: We have studied two-body correlations of atoms in an expanding cloud above and below the Bose-Einstein condensation threshold. The observed correlation function for a thermal cloud shows a bunching behavior, whereas the correlation is flat for a coherent sample. These quantum correlations are the atomic analog of the Hanbury Brown Twiss effect. We observed the effect in three dimensions and studied its dependence on cloud size.
authors.affiliation: Laboratoire Charles Fabry de l'Institut d'Optique, UMR 8501 du CNRS, Centre Scientifique d'Orsay, Bâtiment 503, 91403 Orsay CEDEX, France.
authors.forename: M
authors.initials: M
authors.lastname: Schellekens
authors.forename: R
authors.initials: R
authors.lastname: Hoppeler
authors.forename: A
authors.initials: A
authors.lastname: Perrin
authors.forename: J Viana
authors.initials: JV
authors.lastname: Gomes
authors.forename: D
authors.initials: D
authors.lastname: Boiron
authors.forename: A
authors.initials: A
authors.lastname: Aspect
authors.forename: C I
authors.initials: CI
authors.lastname: Westbrook