Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Localized phase structures growing out of quantum fluctuations in a
  quench of tunnel-coupled atomic condensates   We investigate the relative phase between two weakly interacting 1D
condensates of bosonic atoms after suddenly switching on the tunnel-coupling.
The following phase dynamics is governed by the quantum sine-Gordon equation.
In the semiclassical limit of weak interactions, we observe the parametric
amplification of quantum fluctuations leading to the formation of breathers
with a finite lifetime. The typical lifetime and density of the these
'quasibreathers' are derived employing exact solutions of the classical
sine-Gordon equation. Both depend on the initial relative phase between the
condensates, which is considered as a tunable parameter.

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The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th