Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergence of Tricritical Point and Liquid-Gas Phase in the Massless 2+1
  Dimensional Gross-Neveu Model   A complete thermodynamical analysis of the 2+1 dimensional massless
Gross-Neveu model is performed using the optimized perturbation theory. This is
a non-perturbative method that allows us to go beyond the known large-N results
already at lowest order. Our results, for a finite number of fermion species,
N, show the existence of a tricritical point in the temperature and chemical
potential phase diagram for discrete chiral phase transition allowing us to
precisely to locate it. By studying the phase diagram in the pressure and
inverse density plane, we also show the existence of a liquid-gas phase, which,
so far, was unknown to exist in this model. Finally, we also derive N dependent
analytical expressions for the fermionic mass, critical temperature and
critical chemical potential.

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The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
9
The categories of this paper are: nlin
2
The categories of this paper are: math
18
The categories of this paper are: econ
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
14
The categories of this paper are: math-ph