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- W4320342735 abstract "We theoretically examine a continuity between atomic and molecular Fermi superfluids in a Bose-Fermi mixture near the Feshbach resonance. Considering a two-channel model describing the Feshbach resonance between Fermi and Bose atoms, we have constructed the mean-field framework based on the perturbative expansion of the Feshbach atom-dimer coupling. The resulting effective Hamiltonian exhibits not only the continuity between atom-atom to molecule-molecule Cooper pairings but also becomes equivalent to the two-band-superconductor model with Suhl-Matthias-Walker type pair-exchange coupling. We demonstrate how these atomic and molecular Fermi superfluids coexist within the two-band-like superfluid theory. The pair-exchange coupling and resulting superfluid gaps are found to be strongly enhanced near the Feshbach resonance due to the interplay between the infrared singularity of Bogoliubov phonons and their Landau damping arising from the coupling with fermions. The pair-exchange coupling can be probed via the observation of the intrinsic Josephson effect between atomic and molecular superfluids." @default.
- W4320342735 created "2023-02-13" @default.
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- W4320342735 date "2023-02-09" @default.
- W4320342735 modified "2023-09-23" @default.
- W4320342735 title "BCS-BCS crossover between atomic and molecular superfluids in a Bose-Fermi mixture" @default.
- W4320342735 doi "https://doi.org/10.48550/arxiv.2302.04617" @default.
- W4320342735 hasPublicationYear "2023" @default.
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