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

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

2009-03-06

arxiv.org/abs/0903.1276v2

Phys. Rev. Lett. 102, 140401 (2009)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.102.140401

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.

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