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.

arXiv comment4 pages and 3 figures; Published version in PRA as Rapid Communications

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• Pseudogaps in strongly interacting Fermi gases
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• Attractive Fermi polarons at nonzero temperature with finite impurityconcentration
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• Contact and Momentum Distribution of the Unitary Fermi Gas
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• Pairing fluctuation effects in a strongly coupled color superfluid/superconductor
• Strong Coupling Effects on the Specific Heat of an Ultracold Fermi Gas in the Unitarity Limit