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arXiv · 1412.2542

Condensed phase of Bose-Fermi mixtures with a pairing interaction

Andrea Guidini·Gianluca Bertaina·Davide Emilio Galli·Pierbiagio Pieri
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Abstract

We study the condensed phase of a Bose-Fermi mixture with a tunable pairing interaction between bosons and fermions with many-body diagrammatic methods and fixed-node diffusion Quantum Monte Carlo simulations. A universal behavior of the condensate fraction and bosonic momentum distribution with respect to the boson concentration is found to hold in an extended range of boson-fermion couplings and concentrations. For vanishing boson density, we prove that the bosonic condensate fraction reduces to the quasiparticle weight Z of the Fermi polaron studied in the context of polarized Fermi gases, unifying in this way two apparently unrelated quantities.

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Andrea Guidini, Gianluca Bertaina, Davide Emilio Galli, Pierbiagio Pieri. 2015-02-09. Condensed phase of Bose-Fermi mixtures with a pairing interaction. https://doi.org/10.1103/physreva.91.023603

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