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Abstract: Using a high temperature virial expansion, we present a controllable study ofthe thermodynamics of strongly correlated Fermi gases near the BEC-BCScrossover region. We propose a practical way to determine the expansioncoefficients for both harmonically trapped and homogeneous cases, and calculatethe third order coefficient $b {3}T$ at finite temperatures $T$. Atresonance, a $T$-independent coefficient$b {3,\infty}^{\hom}\approx-0.29095295$ is determined in free space. Theseresults are compared with a recent thermodynamic measurement of $^{6}$Li atoms,at temperatures below the degeneracy temperature, and with Monte Carlosimulations.



Autor: Xia-Ji Liu, Hui Hu, Peter D. Drummond

Fuente: https://arxiv.org/







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