Strongly interacting isotopic Bose-Fermi mixture immersed in a Fermi sea

2011/03/23 by Cheng-Hsun Wu, Ibon Santiago, Jee Woo Park +2 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Fermi liquid theory #Fermi surface #Physics #Quantum mechanics #Quantum oscillations #Quantum, superfluid, helium dynamics #Superconductivity #cond-mat.quant-gas

paper · pdf · doi:10.1103/physreva.84.011601

published as Phys. Rev. A 84, 011601(R) (2011) · 5 pages, 4 figures

arxiv created 2011/03/23 · openalex publication_date 2011/07/13 · arxiv updated 2012/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We have created a triply quantum-degenerate mixture of bosonic ⁴¹K and two fermionic species ⁴⁰K and ⁶Li. The boson is shown to be an efficient coolant for the two fermions, spurring hopes for the observation of fermionic superfluids with imbalanced masses. We observe multiple heteronuclear Feshbach resonances, in particular a wide s-wave resonance for the combination ⁴¹K-⁴⁰K, opening up studies of strongly interacting isotopic Bose-Fermi mixtures. For large imbalance in the local densities of different species, we enter the polaronic regime of dressed impurities immersed in a bosonic or fermionic bath.

Citations

• Expansion of a lithium gas in the BEC-BCS crossover
• Many-body physics with ultracold gases
• Feshbach resonances in ultracold gases
• Observation of Fermi Pressure in a Gas of Trapped Atoms
• Influence of Induced Interactions on the Superfluid Transition in Dilute Fermi Gases
• Bose-Einstein Condensation in a Gas of Sodium Atoms

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• Ultracold Fermionic Feshbach Molecules ofNa<mml:mprescripts/><mml:none/>23K<mml:mprescripts/><mml:none/>40