Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superfluid transition and specific heat of the 2D x-y model: Monte Carlo
  simulation   We present results of large-scale Monte Carlo simulations of the 2D classical
x-y model on the square lattice. We obtain high accuracy results for the
superfluid fraction and for the specific heat as a function of temperature, for
systems of linear size L up to 4096. Our estimate for the superfluid transition
temperature is consistent with those furnished in all previous studies. The
specific heat displays a well-defined peak, whose shape and position are
independent of the size of the lattice for L > 256, within the statistical
uncertainties of our calculations. The implications of these results on the
interpretation of experiments on adsorbed thin films of He-4 are discussed.

12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio