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SIF and Springer-Verlag Berlin Heidelberg 2015

Abstract

It is shown that the efficiency of the universe heating by an inflaton field depends not only on the possible presence of parametric resonance in the production of scalar particles but also strongly depends on the character of the inflaton approach to its mechanical equilibrium point. In particular, when the inflaton oscillations deviate from pure harmonic ones toward a succession of step functions, the production probability rises by several orders of magnitude. This in turn leads to a much higher temperature of the universe after the inflaton decay, in comparison to the harmonic case. An example of the inflaton potential is presented which creates a proper modification of the evolution of the inflaton toward equilibrium and does not destroy the nice features of inflation.

Details

Title
Shape of the inflaton potential and the efficiency of the universe heating
Author
Dolgov, A D; Popov, A V; Rudenko, A S
Pages
1-12
Publication year
2015
Publication date
Sep 2015
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1727603527
Copyright
SIF and Springer-Verlag Berlin Heidelberg 2015