Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermalization of matter waves in speckle potentials   We show that the momentum distribution of a nonlinear matter wave suddenly
released with a finite velocity in a speckle potential converges, after an
out-of-equilibrium evolution, to a universal Rayleigh-Jeans thermal
distribution. By exploring the complete phase diagram of the equilibrated wave,
we discover that for low but nonzero values of the disorder strength, a
large-scale structure -a condensate- appears in the equilibrium distribution.

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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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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: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol