Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermally Induced Density Perturbations in the Inflation Era   The possibility of thermally induced initial density perturbations in
inflationary cosmology is examined. The fluctuation dynamics of a scalar field
plus thermal bath system during slow roll is described by a Langevin-like
equation. Fluctuation-dissipation arguments show that for a wide parameter
range within the standard inflation model, the thermal fluctuations of the
scalar field can dominate its quantum fluctuations. The initial amplitude of
density perturbations is found to lie in a range which is consistent with the
recent observations of cosmic temperature fluctuations.

18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn