Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral anomalies and AdS/CMT in two dimensions   I clarify some recent confusion regarding the holographic description of
finite-density systems in two dimensions. Notably, the chiral anomaly for
symmetry currents in 2d conformal field theories (CFT) completely determines
their correlators. The important exception is a CFT with a gauge theory to
which we may couple an external current, as in the probe D3/D3 system or the
putative dual to the charged BTZ black hole. These systems are analyzed with an
eye for potential condensed matter applications.

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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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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: eess
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: cs