Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Many-flavor Phase Diagram of the (2+1)d Gross-Neveu Model at Finite
  Temperature   We study the phase diagram of the Gross-Neveu model in d=2+1 space-time
dimensions in the plane spanned by temperature and the number of massless
fermion flavors. We use a functional renormalization group approach based on a
nonperturbative derivative expansion that accounts for fermionic as well as
composite bosonic fluctuations. We map out the phase boundary separating the
ordered massive low-temperature phase from the disordered high-temperature
phase. The phases are separated by a second-order phase transition in the 2d
Ising universality class. We determine the size of the Ginzburg region and show
that it scales to zero for large $\Nf$ following a powerlaw, in agreement with
large-$\Nf$ and lattice studies. We also study the regimes of local order above
as well as the classical regime below the critical temperature.

18
The categories of this paper are: econ
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an