Issue |
EPL
Volume 95, Number 4, August 2011
|
|
---|---|---|
Article Number | 43002 | |
Number of page(s) | 6 | |
Section | Atomic, Molecular and Optical Physics | |
DOI | https://doi.org/10.1209/0295-5075/95/43002 | |
Published online | 26 July 2011 |
Shallow Efimov tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation
Centro de Física Nuclear da Universidade de Lisboa - P-1649-003 Lisboa, Portugal, EU
Received:
10
March
2011
Accepted:
28
June
2011
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.
PACS: 34.50.-s – Scattering of atoms and molecules / 34.50.Cx – Elastic; ultracold collisions
© EPLA, 2011
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