Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inflationary cosmology with scalar field and radiation   We present a simple, exact and self-consistent cosmology with a
phenomenological model of quantum creation of radiation due to decay of the
scalar field. The decay drives a non-isentropic inflationary epoch, which exits
smoothly to the radiation era, without reheating. The initial vacuum for
radiation is a regular Minkowski vacuum. The created radiation obeys standard
thermodynamic laws, and the total entropy produced is consistent with the
accepted value. We analyze the difference between the present model and a model
with decaying cosmological constant previously considered.

1
The categories of this paper are: cs
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ