title: High-order quantum resonances observed in a periodically kicked Bose-Einstein condensate.
abstract: We have observed high-order quantum resonances in a realization of the quantum delta-kicked rotor, using Bose-condensed Na atoms subjected to a pulsed standing wave of laser light. These resonances occur for pulse intervals that are rational fractions of the Talbot time, and are characterized by ballistic momentum transfer to the atoms. The condensate's narrow momentum distribution not only permits the observation of the quantum resonances at 3/4 and 1/3 of the Talbot time, but also allows us to study scaling laws for the resonance width in quasimomentum and pulse interval.
authors.affiliation: Atomic Physics Division, National Institute of Science and Technology, Gaithersburg, Maryland 20899-8424, USA.
authors.forename: C
authors.initials: C
authors.lastname: Ryu
authors.forename: M F
authors.initials: MF
authors.lastname: Andersen
authors.forename: A
authors.initials: A
authors.lastname: Vaziri
authors.forename: M B
authors.initials: MB
authors.lastname: d'Arcy
authors.forename: J M
authors.initials: JM
authors.lastname: Grossman
authors.forename: K
authors.initials: K
authors.lastname: Helmerson
authors.forename: W D
authors.initials: WD
authors.lastname: Phillips