Universality of the three-body parameter for Efimov states in ultracold cesium

We report on the observation of triatomic Efimov resonances in an ultracold gas of cesium atoms. Exploiting the wide tunability of interactions resulting from three broad Feshbach resonances in the same spin channel, we measure magnetic-field dependent three-body recombination loss. The positions of...

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Bibliographic Details
Published in:Physical review letters 2011-09, Vol.107 (12), p.120401-120401, Article 120401
Main Authors: Berninger, M, Zenesini, A, Huang, B, Harm, W, Nägerl, H-C, Ferlaino, F, Grimm, R, Julienne, P S, Hutson, J M
Format: Article
Language:English
Subjects:
ALKALI METALS
ANGULAR MOMENTUM
ATOMS
CESIUM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELEMENTS
INTERACTIONS
MAGNETIC FIELDS
MANY-BODY PROBLEM
METALS
PARTICLE PROPERTIES
RECOMBINATION
RESONANCE
SPECTRA
SPIN
THREE-BODY PROBLEM
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Summary:We report on the observation of triatomic Efimov resonances in an ultracold gas of cesium atoms. Exploiting the wide tunability of interactions resulting from three broad Feshbach resonances in the same spin channel, we measure magnetic-field dependent three-body recombination loss. The positions of the loss resonances yield corresponding values for the three-body parameter, which in universal few-body physics is required to describe three-body phenomena and, in particular, to fix the spectrum of Efimov states. Our observations show a robust universal behavior with a three-body parameter that stays essentially constant.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.120401