Inflation and late-time acceleration from a double-well potential with cosmological constant

TL;DR

This paper proposes a cosmological model without a big bang singularity, featuring an inflationary phase, a phase transition, reheating, and a smooth transition to the standard Lambda-CDM universe.

Contribution

It introduces a novel non-singular universe model with a double-well potential and cosmological constant that unifies early inflation and late-time acceleration.

Findings

Achieves a non-singular universe with inflation and late acceleration

Reheats the universe to MeV temperatures after phase transition

Smoothly matches the standard Lambda-CDM cosmology

Abstract

A model of a universe without big bang singularity is presented, which displaysanearly inflationary period ending just before a phase transition to a deflationary epoch. The model produces enough heavy particles so as to reheat the universe at temperatures in the MeV regime. After the reheating, it smoothly matches the standard $\Lambda$CDM scenario.