Universality of the Three-Body Parameter for Efimov States in Ultracold Cesium

Journal Article · Fri Sep 16 04:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.120401· OSTI ID:21611772

Berninger, M; Zenesini, A; Huang, B; Harm, W; Naegerl, H -C; Ferlaino, F ^[1]; Grimm, R ^[1]; Julienne, P S ^[2]; Hutson, J M ^[3]

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1. Institut fuer Experimentalphysik and Zentrum fuer Quantenphysik, Universitaet Innsbruck, 6020 Innsbruck (Austria)
2. Joint Quantum Institute, NIST and University of Maryland, Gaithersburg, Maryland 20899-8423 (United States)
3. Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (United Kingdom)

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.

• OSTI ID: 21611772
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ANGULAR MOMENTUM
ATOMS
CESIUM
ELEMENTS
INTERACTIONS
MAGNETIC FIELDS
MANY-BODY PROBLEM
METALS
PARTICLE PROPERTIES
RECOMBINATION
RESONANCE
SPECTRA
SPIN
THREE-BODY PROBLEM