title: Rotons in gaseous Bose-Einstein condensates irradiated by a laser.
abstract: A gaseous Bose-Einstein condensate irradiated by a far off-resonance laser has long-range interatomic correlations caused by laser-induced dipole-dipole interactions. These correlations, which are tunable via the laser intensity and frequency, can produce a "roton" minimum in the excitation spectrum--behavior reminiscent of the strongly correlated superfluid liquid He II.
authors.affiliation: Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
authors.forename: D H J
authors.initials: DH
authors.lastname: O'Dell
authors.forename: S
authors.initials: S
authors.lastname: Giovanazzi
authors.forename: G
authors.initials: G
authors.lastname: Kurizki