Quantum Monte Carlo study of a resonant Bose-Fermi mixture

We study a resonant Bose-Fermi mixture at zero temperature by using the fixed-node diffusion Monte Carlo method. We explore the system from weak to strong boson-fermion interaction, for different concentrations of the bosons relative to the fermion component. We focus on the case where the boson den...

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Bibliographic Details
Published in:Physical review letters 2013-03, Vol.110 (11), p.115303-115303, Article 115303
Main Authors: Bertaina, G, Fratini, E, Giorgini, S, Pieri, P
Format: Article
Language:English
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Summary:We study a resonant Bose-Fermi mixture at zero temperature by using the fixed-node diffusion Monte Carlo method. We explore the system from weak to strong boson-fermion interaction, for different concentrations of the bosons relative to the fermion component. We focus on the case where the boson density n(B) is smaller than the fermion density n(F), for which a first-order quantum phase transition is found from a state with condensed bosons immersed in a Fermi sea, to a Fermi-Fermi mixture of composite fermions and unpaired fermions. We obtain the equation of state and the phase diagram, and we find that the region of phase separation shrinks to zero for vanishing n(B).
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.115303