2010/02/28 by Elmar Haller, Manfred J. Mark, Russell Hart +5
Physics and Astronomy · #cond-mat.quant-gas #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.104.153203
published as Phys. Rev. Lett. 104, 153203 (2010) · 4 pages, 4 figures
arxiv created 2010/04/03 · arxiv updated 2015/03/13
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.