Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The $1/N$ expansion for stochastic fields in de Sitter spacetime   We propose a $1/N$ expansion of Starobinsky and Yokoyama's effective
stochastic approach for light quantum fields on superhorizon scales in de
Sitter spacetime. We explicitly compute the spectrum and the eigenfunctions of
the Fokker-Planck operator for a O($N$)-symmetric theory with quartic
selfinteraction at leading and next-to-leading orders in this expansion. We
obtain simple analytical expressions valid in various nonperturbative regimes
in terms of the interaction coupling constant.

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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
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The categories of this paper are: eess
16
The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom