Pomeranchuk cooling of the SU($2N$) ultra-cold fermions in optical lattices

Details Pomeranchuk cooling of the SU($2N$) ultra-cold fermions in optical lattices Pomeranchuk cooling of the SU($2N$) ultra-cold fermions in optical lattices

2012-02-28

arxiv.org/abs/1202.6323v1

Physics

Condensed Matter

Quantum Gases

4.2 pages

Scientific paper

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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