Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic Metals and Insulators with Helical Symmetry   Homogeneous, zero temperature scaling solutions with Bianchi VII spatial
geometry are constructed in Einstein-Maxwell-Dilaton theory. They correspond to
quantum critical saddle points with helical symmetry at finite density.
Assuming $AdS_{5}$ UV asymptotics, the small frequency/(temperature) dependence
of the AC/(DC) electric conductivity along the director of the helix are
computed. A large class of insulating and conducting anisotropic phases is
found, as well as isotropic, metallic phases. Conduction can be dominated by
dissipation due to weak breaking of translation symmetry or by a quantum
critical current.

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The categories of this paper are: quant-ph
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The categories of this paper are: physics
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys