The third virial coefficient of a two-component unitary Fermi gas across an Efimov-effect threshold

Chao Gao; Shimpei Endo; Yvan Castin

doi:10.1209/0295-5075/109/16003

The third virial coefficient of a two-component unitary Fermi gas across an Efimov-effect threshold

Chao Gao, Shimpei Endo, Yvan Castin

SCI - Physics

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We consider a mixture of two single-spin-state fermions with an interaction of negligible range and infinite s-wave scattering length. By varying the mass ratio across one can switch on and off the Efimov effect. We determine analytically the third cluster coefficient of the gas. We show that it is a smooth function of across since, unexpectedly, the three-body parameter characterizing the interaction is relevant even on the non-Efimovian side .

Original language	English
Article number	16003 (6pp)
Journal	Europhysics Letters
Volume	109
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/109/16003
Publication status	Published - 2015 Jan 1

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N2 - We consider a mixture of two single-spin-state fermions with an interaction of negligible range and infinite s-wave scattering length. By varying the mass ratio across one can switch on and off the Efimov effect. We determine analytically the third cluster coefficient of the gas. We show that it is a smooth function of across since, unexpectedly, the three-body parameter characterizing the interaction is relevant even on the non-Efimovian side .

AB - We consider a mixture of two single-spin-state fermions with an interaction of negligible range and infinite s-wave scattering length. By varying the mass ratio across one can switch on and off the Efimov effect. We determine analytically the third cluster coefficient of the gas. We show that it is a smooth function of across since, unexpectedly, the three-body parameter characterizing the interaction is relevant even on the non-Efimovian side .

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The third virial coefficient of a two-component unitary Fermi gas across an Efimov-effect threshold

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