Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective Gauge Theories, The Renormalization Group, and
  High-Temperature Superconductivity   These lectures serve as an introduction to the renormalization group approach
to effective field theories, with emphasis on systems with a Fermi surface. For
such systems, demanding appropriate scaling with respect to the renormalization
group for the appropriate excitations leads directly to the important concept
of quasiparticles and the connexion between large-N_f treatments and
renormalization group running in theory space. In such treatments N_f denotes
the number of effective fermionic degrees of freedom above the Fermi surface;
this number is roughly proportional to the size of the Fermi surface. As an
application of these ideas, non-trivial infra red structure in three
dimensional U(1) gauge theory is discussed, along with applications to the
normal phase physics of high-T_c superconductors, in an attempt to explain the
experimentally observed deviations from Fermi liquid behaviour. Specifically,
the direct current resistivity of the theory is computed at finite
temperatures, $T$, and is found to acquire $O(1/N_f)$ corrections to the linear
$T$ behaviour. Such scaling corrections are consistent with recent experimental
observations in high T_c superconducting cuprates.

14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex