Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous conductivity in holographic QCD   We compute the longitudinal and Hall conductivities in the parallel phase of
the Sakai-Sugimoto model with a transverse magnetic field. We find that the
conductivities behave as if the charge of the system is made out of two
different types; one behaves as charge carriers flowing through a dissipative
neutral medium, while the other does not feel the dissipation. We also
investigate the case of an electric field parallel to the magnetic field and
find that in this case the system behaves as a perfect conductor. Both of the
unusual behaviors stem from the axial anomaly.

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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin