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Article Dans Une Revue Physical Review Letters Année : 2019

Few Versus Many-Body Physics of an Impurity Immersed in a Superfluid of Spin 1/2 Attractive Fermions

F. Chevy

Résumé

In this Letter we investigate the properties of an impurity immersed in a superfluid of strongly correlated spin 1/2 fermions and we calculate the beyond-mean-field corrections to the energy of a weakly interacting impurity. We show that these corrections are divergent and have to be regularized by properly accounting for three-body physics in the problem and that our approach naturally provides a unifying framework for Bose and Fermi polaron physics.

Dates et versions

hal-02309072 , version 1 (09-10-2019)

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M. Pierce, X. Leyronas, F. Chevy. Few Versus Many-Body Physics of an Impurity Immersed in a Superfluid of Spin 1/2 Attractive Fermions. Physical Review Letters, 2019, 123 (8), pp.080403. ⟨10.1103/PhysRevLett.123.080403⟩. ⟨hal-02309072⟩
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