Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scaling of the Holographic AC conductivity for non-Fermi liquids at
  criticality   The frequency dependence of the AC conductivity is studied in a holographic
model of a non-fermi liquid that is amenable to both analytical and numerical
computation. In the regime that dissipation dominates the DC conductivity, the
AC conductivity is described well in the IR by a Drude peak despite the absence
of quasiparticles. In the regime where pair-production-like processes dominate
the conductivity there is no Drude peak. A scaling tail is found for the AC
conductivity that is independent of the charge density and momentum
dissipation. Evidence is given that this scaling tail $\sigma_{AC}\sim
\omega^m$ appears generically in quantum critical holographic systems and the
associated scaling exponent $m$ is calculated in terms of the Lifshitz and
conduction critical exponents.

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The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom