Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monte Carlo simulations of the CP^3 model and U(1) gauge theory in the
  presence of a theta-term   A theta-term, which couples to topological charge, is added to the
two-dimensional lattice CP^3 model and U(1) gauge theory. Monte Carlo
simulations are performed and compared to strong-coupling character expansions.
In certain instances, a flattening behavior occurs in the free-energy at
sufficiently large theta, but the effect is an artifact of the simulation
methods.

14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph