Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum criticality in a dissipative (2+1)-dimensional XY model of
  circulating currents in high-Tc cuprates   We present large-scale Monte Carlo results for the dynamical critical
exponent z and the spatio-temporal two-point correlation function of a
(2+1)-dimensional quantum XY model with bond dissipation, proposed to describe
a quantum critical point in high-Tc cuprates near optimal doping. The phase
variables of the model, originating with a parametrization of circulating
currents within the CuO_2 unit cells in cuprates, are compact,
{\theta_{r,\tau}} \in [-\pi,\pi>. The dynamical critical exponent is found to
be z \approx 1, and the spatio-temporal correlation functions are explicitly
demonstrated to be isotropic in space-imaginary time. The model thus has a
fluctuation spectrum where momentum and frequency enter on equal footing,
rather than having the essentially momentum-independent marginal Fermi
liquid-like fluctuation spectrum previously reported for the same model.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom