Comparative study of strong coupling theories of a trapped Fermi gas at unitarity
Hui Hu, Xia-Ji Liu, and Peter D. Drummond
TL;DR
This paper compares recent thermodynamic measurements of a trapped Fermi gas at unitarity with various strong coupling theories and quantum Monte Carlo simulations, finding the Nozieres and Schmitt-Rink approach aligns best with experimental data.
Contribution
It provides a systematic comparison of strong coupling theories with experimental and simulation data for a trapped Fermi gas at unitarity.
Findings
Nozieres and Schmitt-Rink theory agrees well with experiments
Experimental data has a precision of a few percent
The study validates certain many-body approaches 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.
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