Observation of universality in ultracold 7Li three-body recombination

Abstract

We report on experimental evidence of universality in ultracold 7Li atoms' three-body recombination loss in the vicinity of a Feshbach resonance. We observe a recombination minimum and an Efimov resonance in regions of positive and negative scattering lengths, respectively, which are connected through the pole of the Feshbach resonance. Both observed features lie deeply within the range of validity of the universal theory and we find that the relations between their properties, i.e. widths and locations, are in an excellent agreement with the theoretical predictions.

5 pages, 2 figures

References in corpus (10)

• Observation of an Efimov spectrum in an atomic system
• Collisional stability of a three-component degenerate Fermi gas
• Three-body recombination in a three-state Fermi gas with widely tunable interactions
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Three-boson problem near a narrow Feshbach resonance
• Observation of an Efimov-like resonance in ultracold atom-dimer scattering
• Evidence for Universal Four-Body States Tied to an Efimov Trimer
• Observation of heteronuclear atomic Efimov resonances
• Limits on Universality in Ultracold Three-Boson Recombination
• Range Corrections to Three-Body Observables near a Feshbach Resonance

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