Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long String Dynamics in Pure Gravity on AdS$_3$   We study the classical dynamics of a completion of pure AdS gravity in 3D,
whose only degrees of freedom are boundary gravitons and long strings. We argue
that the best regime for describing pure gravity is that of "heavy" strings,
for which back-reaction effects on the metric must be taken into account. We
show that once back-reaction is properly accounted for, regular finite-energy
states are produced by heavy strings even in the infinite-tension limit. Such a
process is similar to, but different from, nucleation of space out of a "bubble
of nothing."

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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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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: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math