Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-loop Quantum Corrections to the Entropy for an Extremal
  Reissner-Nordstr\"om Black Hole   The first quantum corrections to the entropy for an eternal 4-dimensional
extremal Reissner-Nordstr\"om black hole is investigated at one-loop level, in
the large mass limit of the black hole, making use of the conformal techniques
related to the optical metric. A leading cubic horizon divergence is found and
other divergences appear due to the singular nature of the optical manifold.
The area law is shown to be violated.

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The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
9
The categories of this paper are: nlin