Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal Upper Bound to the Entropy of a Charged System   We derive a universal upper bound to the entropy of a charged system. The
entropy bound follows from application of the generalized second law of
thermodynamics to a gedanken experiment in which an entropy-bearing charged
system falls into a charged black hole. This bound is stronger than the
Bekenstein entropy bound for neutral systems.

27
The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph