The Fermi-Hubbard model at unitarity

Burovski, Evgeni and Prokof'ev, Nikolay and Svistunov, Boris and Troyer, Matthias (2006) The Fermi-Hubbard model at unitarity. New Journal of Physics, 8. ISSN 1367-2630

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We simulate the dilute attractive Fermi-Hubbard model in the unitarity regime using a diagrammatic determinant Monte Carlo algorithm with worm-type updates. We obtain the dependence of the critical temperature on the filling factor $\nu$ and, by extrapolating to $\nu \to 0$, determine the universal critical temperature of the continuum unitary Fermi gas in units of Fermi energy: $T_c/\epsilon_F=0.152(7)$. We also determine the thermodynamic functions and show how the Monte Carlo results can be used for accurate thermometry of a trapped unitary gas.

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Journal Article
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New Journal of Physics
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05 Mar 2013 14:50
Last Modified:
21 Nov 2022 23:16