Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isospin Lattice Gas Model and Nuclear-Matter Phase Diagram and
  Pressure-Volume Isotherms   We study a cubic lattice gas model for nuclear matter where each lattice site
can be either occupied, by one proton or one neutron, or unoccupied. A
nearest-neighbor interaction of the form $ - \sum_{<ij>} J_{ij}\tau_{zi}
\tau_{zj}$ is assumed. Our model is an isospin-1 Ising model, with ${\tau_z}$ =
(1,0,-1) representing respectively (proton, vacancy, neutron).
  A kinetic-energy term has been included in our model. Under the
Bragg-Williams mean field approximation our model exhibits the existence of a
dense phase (liquid-like) and a rare phase (gas-like). The nuclear-matter p-v
isotherms given by our model are discussed.

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The categories of this paper are: astro-ph
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The categories of this paper are: econ
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
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The categories of this paper are: stat
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc