Comparative study of strong coupling theories of a trapped Fermi gas at unitarity

Abstract

We present a systematic comparison of the most recent thermodynamic measurements of a trapped Fermi gas at unitarity with predictions from strong coupling theories and quantum Monte Carlo (MC) simulations. The accuracy of the experimental data, of the order of a few percent, allows a precise test of different many-body approaches. We find that a Nozieres and Schmitt-Rink treatment of fluctuations is in excellent agreement with the experimental data and available MC calculations at unitarity.

4 pages and 3 figures; Published version in PRA as Rapid Communications

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Cited by in corpus (21)

• Thermodynamic Measurements in a Strongly Interacting Fermi Gas
• Universal contact of strongly interacting fermions at finite temperatures
• Thermodynamics of a trapped unitary Fermi gas
• Microscopic derivation of the extended Gross-Pitaevskii equation for quantum droplets in binary Bose mixtures
• High temperature thermodynamics of strongly interacting s-wave and p-wave Fermi gases in a harmonic trap
• Gapless topological Fulde-Ferrell superfluidity induced by in-plane Zeeman field
• Phase separation in imbalanced fermion superfluids beyond mean-field
• Critical Behaviour in Trapped Strongly Interacting Fermi Gases
• Momentum-resolved radio-frequency spectroscopy of a spin-orbit coupled atomic Fermi gas near a Feshbach resonance in harmonic traps
• Superfluid density and Berezinskii-Kosterlitz-Thouless transition of a spin-orbit coupled Fulde-Ferrell superfluid
• Momentum-resolved spectroscopy of a Fermi liquid
• Three-dimensional spin-orbit coupled Fermi gases: Fulde-Ferrell pairing, Majorana fermions, Weyl fermions and gapless topological superfluidity
• The finite-temperature thermodynamics of a trapped unitary Fermi gas within fractional exclusion statistics
• Equation of state and contact of a strongly interacting Bose gas in the normal state
• Nonequilibrium BCS-BEC crossover and unconventional FFLO superfluid in a strongly interacting driven-dissipative Fermi gas
• Many-body theories of density response for a strongly correlated Fermi gas
• Spectral properties and observables in ultracold Fermi gases
• Isothermal compressibility and effects of multi-body molecular interactions in a strongly interacting ultracold Fermi gas
• Spectral function of Fermi polarons at finite temperature from a self-consistent many-body $T$-matrix approach in real frequency
• Altermagnetism-driven FFLO superconductivity in finite-filling 2D lattices
• First and second sound of a unitary Fermi gas in highly elongated harmonic traps