Assisted inflation in Bianchi VI0 cosmologies

TL;DR

This paper derives exact solutions for Bianchi VI0 cosmologies with multiple scalar fields, analyzing their inflationary behavior and showing how the number and interaction of fields influence inflation likelihood.

Contribution

It provides new exact models for Bianchi VI0 spacetimes with multiple scalar fields, enabling detailed study of inflationary phases before asymptotic regimes.

Findings

Inflation more likely with more non-interacting fields.

Inflation less likely with more interacting scalar fields.

Exact solutions facilitate detailed inflation analysis.

Abstract

Exact models for Bianchi VI0 spacetimes with multiple scalar fields with exponential potentials have been derived and analysed. It has been shown that these solutions, when they exist, attract neighbouring solutions in the two cases corresponding to interacting and non-interacting fields. Unlike the results obtained in a previous work dealing with the late-time inflationary behaviour of Bianchi VI0 cosmologies, the knowledge of exact solutions has made possible to study in detail the occurrence of inflation before the asymptotic regime. As happened in preceding works, here as well inflation is more likely to happen with a higher number of non-interacting fields or a lower number of interacting scalar fields.