Evidence for Universal Four-Body States Tied to an Efimov Trimer

Journal Article · Fri Apr 10 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.140401· OSTI ID:21180344

Ferlaino, F; Knoop, S; Berninger, M; Harm, W; Naegerl, H -C ^[1]; D'Incao, J P ^[2]; Grimm, R ^[1]

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1. Institut fuer Experimentalphysik and Zentrum fuer Quantenphysik, Universitaet Innsbruck, 6020 Innsbruck (Austria)
2. Institut fuer Quantenoptik und Quanteninformation, Oesterreichische Akademie der Wissenschaften, 6020 Innsbruck (Austria)

We report on the measurement of four-body recombination rate coefficients in an atomic gas. Our results obtained with an ultracold sample of cesium atoms at negative scattering lengths show a resonant enhancement of losses and provide strong evidence for the existence of a pair of four-body states, which is strictly connected to Efimov trimers via universal relations. Our findings confirm recent theoretical predictions and demonstrate the enrichment of the Efimov scenario when a fourth particle is added to the generic three-body problem.

• OSTI ID: 21180344
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CESIUM
FOUR-BODY PROBLEM
RECOMBINATION
SCATTERING LENGTHS
THREE-BODY PROBLEM