Confinement-induced resonances in low-dimensional quantum systems

Elmar Haller, Manfred J. Mark, Russell Hart, Johann G. Danzl, Lukas Reichsöllner, Vladimir Melezhik, Peter Schmelcher, Hanns-Christoph Nägerl

Research output: Contribution to journalArticlepeer-review

197 Citations (Scopus)


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.
Original languageEnglish
Article number153203
Number of pages4
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 1 Apr 2010


  • quantum systems
  • confinement-induced resonances
  • quantum-gas systems
  • anisotropy
  • photonics


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