The Fermi-Hubbard model at unitarity

Details The Fermi-Hubbard model at unitarity The Fermi-Hubbard model at unitarity

2006-05-12

arxiv.org/abs/cond-mat/0605350v2

New J.Phys.8:153,2006

Physics

Condensed Matter

Superconductivity

v2: minor corrections, fig 7 replaced

Scientific paper

10.1088/13=

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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