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Three-body parameter for Efimov states in 6Li

Huang, B.; O'Hara, K.M.; Grimm, R.; Hutson, J.M.; Petrov, D.S.

Three-body parameter for Efimov states in 6Li Thumbnail


B. Huang

K.M. O'Hara

R. Grimm

D.S. Petrov


We present a state-of-the-art reanalysis of experimental results on Efimov resonances in the three-fermion system of Li6. We discuss different definitions of the three-body parameter (3BP) for Efimov states and adopt a definition that excludes effects due to deviations from universal scaling for low-lying states. We develop a finite-temperature model for the case of three distinguishable fermions and apply it to the excited-state Efimov resonance to obtain the most accurate determination to date of the 3BP in an atomic three-body system. Our analysis of ground-state Efimov resonances in the same system yields values for the three-body parameter that are consistent with the excited-state result. Recent work has suggested that the reduced 3BP for atomic systems is a near-universal quantity, almost independent of the particular atom involved. However, the value of the 3BP obtained for Li6 is significantly (∼20%) different from that previously obtained from the excited-state resonance in Cs. The difference between these values poses a challenge for theory.


Huang, B., O'Hara, K., Grimm, R., Hutson, J., & Petrov, D. (2014). Three-body parameter for Efimov states in 6Li. Physical Review A, 90(4), Article 043636.

Journal Article Type Article
Publication Date Oct 30, 2014
Deposit Date Nov 13, 2014
Publicly Available Date Dec 2, 2014
Journal Physical Review A
Print ISSN 1050-2947
Electronic ISSN 1094-1622
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 90
Issue 4
Article Number 043636


Published Journal Article (340 Kb)

Copyright Statement
Reprinted with permission from the American Physical Society: Bo Huang (黄博), Kenneth M. O'Hara, Rudolf Grimm, Jeremy M. Hutson, and Dmitry S. Petrov (2014) 'Three-body parameter for Efimov states in 6Li.', Physical review A., 90 (4), 043636. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.

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