The cosmological model with an analytic exit from inflation

TL;DR

This paper presents an exact analytical cosmological model that describes a smooth transition from inflation to radiation and matter-dominated eras, supporting the decay of Higgs bosons as a mechanism for exit from inflation.

Contribution

It introduces a novel exact solution for a flat universe with a scalar field, enabling an analytical exit from inflation into subsequent cosmic epochs.

Findings

Supports decay of Higgs bosons during exit from inflation

Provides an exact solution for transition between cosmic eras

Models a universe with a scalar field enabling smooth evolution

Abstract

A cosmological model of homogeneous and isotropic spatially flat Universe with gravitating self-interacting scalar field is considered. The exact solution, admitting an analytical exit from inflationary stage into a radiation era and a matter dominated epoch, is obtained by virtue of ``fine turning of the potential'' method. We found that an inflationary stage is supported by decay of higgs bosons in the framework of the solution obtained. Freidmann's regim is associated with adiabatical expantion of the Universe, filled by the matter with special equation of state. Thus we presented the exact solution which solve the problem of transition from an inflationary to a radiation eras or long standing `exit' problem.