Realization of an excited, strongly correlated quantum gas phase

Elmar Haller, Mattias Gustavsson, Manfred J. Mark, Johann G. Danzl, Russell Hart, Guido Pupillo, Hanns-Christoph Nägerl

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354 Citations (Scopus)


Ultracold atomic physics offers myriad possibilities to study strongly correlated many-body systems in lower dimensions. Typically, only ground-state phases are accessible. Using a tunable quantum gas of bosonic cesium atoms, we realized and controlled in one-dimensional geometry a highly excited quantum phase that is stabilized in the presence of attractive interactions by maintaining and strengthening quantum correlations across a confinement-induced resonance. We diagnosed the crossover from repulsive to attractive interactions in terms of the stiffness and energy of the system. Our results open up the experimental study of metastable, excited, many-body phases with strong correlations and their dynamical properties.
Original languageEnglish
Pages (from-to)1224-1227
Number of pages4
Issue number5945
Publication statusPublished - 4 Sep 2009


  • quantum gas phase
  • ultracold atomic physics
  • confinement-induced resonance
  • bosonic cesium atoms

Cite this

Haller, E., Gustavsson, M., Mark, M. J., Danzl, J. G., Hart, R., Pupillo, G., & Nägerl, H-C. (2009). Realization of an excited, strongly correlated quantum gas phase. Science, 325(5945), 1224-1227.