Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pomeranchuk cooling of the SU($2N$) ultra-cold fermions in optical
  lattices   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.

12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg