Trapped ${}^{173}$Yb Fermi gas across an orbital Feshbach resonance

Abstract

Starting with the two-band description of an orbital Feshbach resonance, we study superfluid properties of a trapped ${}^{173}$Yb Fermi gas under the assumptions of a local-density approximation for the trapping potential and a mean-field approximation for the intra-band Cooper pairings. In particular, we investigate the competition and interplay between the pair-breaking effect that is caused by the inter-band detuning energy, and the pair-breaking and thermal-broadening effects that are simultaneously caused by the temperature. We predict several experimental signatures that are directly caused by this interplay including a spatial separation of superfluid and normal phases within the trap, and could play decisive roles in probing two-band superfluidity in these systems.

arXiv comment6 pages with 4 figures; to appear in PRA

References in corpus (8)

• Feshbach Resonances in Ultracold Gases
• Theory of ultracold Fermi gases
• Observation of an orbital interaction-induced Feshbach resonance in 173-Yb
• A strongly interacting gas of two-electron fermions at an orbital Feshbach resonance
• Orbital Feshbach Resonance in Alkali-Earth Atoms
• Strongly correlated Fermi superfluid near an orbital Feshbach resonance: Stability, equation of state and Leggett mode
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• Two-band superfluidity and intrinsic Josephson effect in alkaline-earth Fermi gases across an orbital Feshbach resonance

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• Interaction Control of Ultracold Alkaline-Earth Atoms
• A strongly interacting Sarma superfluid near orbital Feshbach resonances
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• Mechanism of screening or enhancing the pseudogap throughout the two-band Bardeen-Cooper-Schrieffer to Bose-Einstein condensate crossover
• Single-particle Excitations and Strong Coupling Effects in the BCS-BEC Crossover Regime of a Rare-Earth Fermi Gas with an Orbital Feshbach Resonance
• Diversified vortex phase diagram for a rotating trapped two-band Fermi gas in the BCS-BEC crossover
• Frustrated orbital Feshbach resonances in a Fermi gas
• Enhanced Fulde-Ferrell-Larkin-Ovchinnikov and Sarma superfluid states near an orbital Feshbach resonance
• Superfluid properties of an ultracold Fermi gas with an orbital Feshbach resonance in the BCS-BEC crossover region
• Two-band atomic superfluidity in the presence of an orbital Feshbach resonance