Haller, Elmar; Gustavsson, Mattias; Mark, Manfred; Danzl, Johann GIST Austria ; Hart, Russell; Pupillo, Guido; Nägerl, Hanns
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.
We thank S. Giorgini and C. Menotti for helpful discussions and for providing the theory curves shown in Fig. 3A. We are indebted to R. Grimm for generous support and to H. Häffner and his group for the loan of a charge-coupled device camera. We gratefully acknowledge funding by the Austrian Ministry of Science and Research (Bundesministerium für Wissenschaft und Forschung) and the Austrian Science Fund (Fonds zur Förderung der wissenschaftlichen Forschung) in the form of a START prize grant and by the European Union through the Specific Targeted Research Project FP7-ICT-2007-C project NAME-QUAM (Nanodesigning of Atomic and Molecular Quantum Matter) and within the framework of the EuroQUASAR collective research project Quantum-Degenerate Gases for Precision Measurements. R.H. is supported by a Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme.
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Haller E, Gustavsson M, Mark M, et al. Realization of an excited, strongly correlated quantum gas Phase. Science. 2009;325(5945):1224-1227. doi:10.1126/science.1175850
Haller, E., Gustavsson, M., Mark, M., Danzl, J. G., Hart, R., Pupillo, G., & Nägerl, H. (2009). Realization of an excited, strongly correlated quantum gas Phase. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.1175850
Haller, Elmar, Mattias Gustavsson, Manfred Mark, Johann G Danzl, Russell Hart, Guido Pupillo, and Hanns Nägerl. “Realization of an Excited, Strongly Correlated Quantum Gas Phase.” Science. American Association for the Advancement of Science, 2009. https://doi.org/10.1126/science.1175850.
E. Haller et al., “Realization of an excited, strongly correlated quantum gas Phase,” Science, vol. 325, no. 5945. American Association for the Advancement of Science, pp. 1224–1227, 2009.
Haller E, Gustavsson M, Mark M, Danzl JG, Hart R, Pupillo G, Nägerl H. 2009. Realization of an excited, strongly correlated quantum gas Phase. Science. 325(5945), 1224–1227.
Haller, Elmar, et al. “Realization of an Excited, Strongly Correlated Quantum Gas Phase.” Science, vol. 325, no. 5945, American Association for the Advancement of Science, 2009, pp. 1224–27, doi:10.1126/science.1175850.