Thermodynamic properties of the SU($2N$) ultra-cold fermions in optical lattices

ORAL

Abstract

We investigate the thermodynamic properties of a half-filled SU($2N$) Fermi-Hubbard model in the two-dimensional square lattice using the determinantal quantum Monte Carlo simulation, which is free of the fermion ``sign problem''. The large number of hyperfine-spin components enhances spin fluctuations, which facilitates the Pomeranchuk cooling to temperatures comparable to the superexchange energy scale at the case of SU$(6)$. Various quantities including entropy, charge fluctuation, and spin correlations have been calculated.

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Authors

  • Hsiang-hsuan Hung

    • Department of Physics, University of California

  • Zi Cai

    • Department of Physics, University of California
    • Department of Physics, University of California, San Diego

  • Lei Wang

    • Institute for Theoretical Physics, ETH

  • Dong Zheng

    • Department of Physics, Tsinghua University

  • Congjun Wu

    • Department of Physics, University of California