The Efimov effect in lithium 6

Details The Efimov effect in lithium 6 The Efimov effect in lithium 6

2010-08-13

arxiv.org/abs/1008.2260v3

Comptes Rendus Physique, v. 12, iss. 1, p. 13-26

Physics

Condensed Matter

Quantum Gases

12 pages, 8 figures. Same as published version. Contains additions detailing the derivation of some formulae; http://dx.doi.

Scientific paper

10.1016/j.crhy.2010.12.002

We analyse the recent experiments investigating the low-energy physics of three lithium 6 atoms in different internal states with resonant two-body scattering lengths. All observed features are qualitatively consistent with the expected Efimov effect, i.e. the effective universal three-body attraction that arises for large values of the scattering lengths. However, we find that a quantitative description at negative energy requires non-universal two- and three-body corrections due to presently unknown behaviour at short distance. An attempt to implement these corrections is made through energy-dependent parameters fitted to the experimental data.

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