We study by diagrammatic means a Bose-Fermi mixture, with boson-fermion coupling tuned by a Fano- Feshbach resonance. For increasing coupling, the growing boson-fermion pairing correlations progressively reduce the boson condensation temperature and make it eventually vanish at a critical coupling. Such quantum critical point depends very weakly on the population imbalance and, for vanishing boson densities, coincides with that found for the polaron-molecule transition in a strongly imbalanced Fermi gas, thus bridging two quite distinct physical systems.

Pairing and condensation in a resonant Bose-Fermi mixture

PIERI, Pierbiagio
2010-01-01

Abstract

We study by diagrammatic means a Bose-Fermi mixture, with boson-fermion coupling tuned by a Fano- Feshbach resonance. For increasing coupling, the growing boson-fermion pairing correlations progressively reduce the boson condensation temperature and make it eventually vanish at a critical coupling. Such quantum critical point depends very weakly on the population imbalance and, for vanishing boson densities, coincides with that found for the polaron-molecule transition in a strongly imbalanced Fermi gas, thus bridging two quite distinct physical systems.
2010
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/200490
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