Confinement-induced resonances in low-dimensional quantum systems.
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.
Haller
Elmar
E
Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.
Mark
Manfred J
MJ
Hart
Russell
R
Danzl
Johann G
JG
Reichsöllner
Lukas
L
Melezhik
Vladimir
V
Schmelcher
Peter
P
Nägerl
Hanns-Christoph
HC