Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noise induced inflation   We consider a closed Friedmann-Robertson-Walker Universe driven by the back
reaction from a massless, non-conformally coupled quantum scalar field. We show
that the back-reaction of the quantum field is able to drive the cosmological
scale factor over the barrier of the classical potential so that if the
universe starts near zero scale factor (initial singularity) it can make the
transition to an exponentially expanding de Sitter phase, with a probability
comparable to that from quantum tunneling processes. The emphasis throughout is
on the stochastic nature of back reaction, which comes from the quantum
fluctuations of the fundamental fields.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
18
The categories of this paper are: econ
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph