Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Berezinskii-Kosterlitz-Thouless transition in the
  time-reversal-symmetric Hofstadter-Hubbard model   Assuming that two-component Fermi gases with opposite artificial magnetic
fields on a square optical lattice are well-described by the so-called
time-reversal-symmetric Hofstadter-Hubbard model, we explore the thermal
superfluid properties along with the critical Berezinskii-Kosterlitz-Thouless
(BKT) transition temperature in this model over a wide-range of its parameters.
In particular, since our self-consistent BCS-BKT approach takes the multi-band
butterfly spectrum explicitly into account, it unveils how dramatically the
inter-band contribution to the phase stiffness dominates the intra-band one
with an increasing interaction strength for any given magnetic flux.

37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics