Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Born-Infeld Axion-Dilaton Electrodynamics and Electromagnetic
  Confinement   A generalization of Born-Infeld non-linear vacuum electrodynamics involving
axion and dilaton fields is constructed with couplings dictated by
electromagnetic duality and SL(2,R) symmetries in the weak field limit. Besides
the Newtonian gravitational constant the model contains a single fundamental
coupling parameter b0. In the absence of axion and dilaton interactions it
reduces, in the limit as b0 tends to infinity, to Maxwell's linear vacuum
theory while for finite b0 it reduces to the original Born-Infeld model. The
spherically symmetric static sector of the theory is explored in a background
Minkowski spacetime where numerical evidence suggests the existence of
axion-dilaton bound states possessing confined electric flux.

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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: stat
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con