The third virial coefficient of a two-component unitary Fermi gas across an Efimov-effect threshold
Résumé
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 α across α_c ≃ 13.6069 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 α across α_c since, unexpectedly, the three-body parameter characterizing the interaction is relevant even on the non-efimovian side α < α_c.
Domaines
Gaz Quantiques [cond-mat.quant-gas]Origine | Fichiers produits par l'(les) auteur(s) |
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