Graceful exit from inflation using quantum cosmology

TL;DR

This paper demonstrates how quantum cosmology, using the Bohm-de Broglie interpretation, can model a smooth transition from an inflationary phase to a decelerated expansion in the early universe.

Contribution

It introduces a quantum cosmological model with Gaussian superpositions that achieves a graceful exit from inflation, a novel approach in the field.

Findings

Bohmian trajectories show a smooth transition from inflation to deceleration.

Quantum solutions produce a graceful exit without singularities.

The model supports quantum cosmology as a viable framework for early universe dynamics.

Abstract

A massless scalar field without self interaction and string coupled to gravity is quantized in the framework of quantum cosmology using the Bohm-de Broglie interpretation. Gaussian superpositions of the quantum solutions of the corresponding Wheeler-DeWitt equation in minisuperspace are constructed. The bohmian trajectories obtained exhibit a graceful exit from the inflationary Pre-Big Bang epoch to the decelerated expansion phase.