Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current-carrying string loop motion: Limits on the classical description
  and shocks   The dynamical evolution of superconducting cosmic strings is much more
complicated than that of simple Goto-Nambu strings. For this reason, there are
only a few known analytical solutions and no numerical ones. The goal of this
paper is to present numerical solutions for the dynamics of planar
superconducting cosmic string loops. In most cases, a purely dynamical approach
turns out to be insufficient to describe correctly the evolution of a loop due
mainly to the appearance of shocks when spacelike currents are present and
kinks for timelike currents, leading to yet unaccounted for quantum effects.
The consequences of the quantum effects are mostly unknown at this time because
the problem requires a dynamical field theory treatment. It is however likely
that ultimately the result will be massive radiation in the form of charge
carriers from the string.

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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom