Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classical decay of inflaton   We present the first fully non-linear calculation of inflaton decay. We map
inflaton decay onto an equivalent classical problem and solve the latter
numerically. In the $\lambda\phi^4$ model, we find that parametric resonance
develops slower and ends at smaller values of fluctuating fields, as compared
to estimates existing in literature. We also observe a number of qualitatively
new phenomena, including a stage of semiclassical thermalization, during which
the decay of inflaton is essentially as effective as during the resonance
stage.

21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol