title: Confinement-induced resonances in low-dimensional quantum systems.
abstract: We report on the observation of confinement-induced resonances in strongly interacting quantum-gas systems with tunable interactions for one- and two-dimensional geometry. Atom-atom scattering is substantially modified when the s-wave scattering length approaches the length scale associated with the tight transversal confinement, leading to characteristic loss and heating signatures. Upon introducing an anisotropy for the transversal confinement we observe a splitting of the confinement-induced resonance. With increasing anisotropy additional resonances appear. In the limit of a two-dimensional system we find that one resonance persists.
authors.affiliation: Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.
authors.forename: Elmar
authors.initials: E
authors.lastname: Haller
authors.forename: Manfred J
authors.initials: MJ
authors.lastname: Mark
authors.forename: Russell
authors.initials: R
authors.lastname: Hart
authors.forename: Johann G
authors.initials: JG
authors.lastname: Danzl
authors.forename: Lukas
authors.initials: L
authors.lastname: Reichsöllner
authors.forename: Vladimir
authors.initials: V
authors.lastname: Melezhik
authors.forename: Peter
authors.initials: P
authors.lastname: Schmelcher
authors.forename: Hanns-Christoph
authors.initials: HC
authors.lastname: Nägerl