Shallow Efimov tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation

Details Shallow Efimov tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation Shallow Efimov tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation

2011-03-10

arxiv.org/abs/1103.2107v2

Europhys.Lett.95:43002,2011

Physics

Atomic Physics

updated: 6 pages, 1 table, 6 figures

Scientific paper

10.1209/0295-5075/95/43002

We use exact four-boson scattering equations in the momentum-space framework to study the universal properties of shallow Efimov tetramers and their dependence on the two-boson scattering length. We demonstrate that, in contrast to previous predictions, the shallow tetramer in a particular experimentally unexplored regime is not an unstable bound state but an inelastic virtual state. This leads to a resonant behaviour of the atom-trimer scattering length and thereby to a resonant enhancement of the trimer relaxation in ultracold atom-trimer mixtures.

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