Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum corrections to the conductivity of fermion - gauge field models:
  Application to half filled Landau level and high-$T_c$ superconductors   We calculate the Altshuler-Aronov type quantum correction to the conductivity
of $2d$ charge carriers in a random potential (or random magnetic field)
coupled to a transverse gauge field. The gauge fields considered simulate the
effect of the Coulomb interaction for the fractional quantum Hall state at half
filling and for the $t-J$ model of high-$T_c$ superconducting compounds. We
find an unusually large quantum correction varying linearly or quadratically
with the logarithm of temperature, in different temperature regimes.

3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: math