Semi-Classical Isotropization of the Universe during a de Sitter phase

TL;DR

This paper investigates how semi-classical states in a Bianchi type I cosmological model can describe the universe's transition to isotropy during a de Sitter phase, linking quantum states to late-time cosmic uniformity.

Contribution

It extends semi-classical analysis to more general Bianchi models with curvature and potential terms, proposing a mechanism for isotropization in early universe scenarios.

Findings

Semi-classical states can describe isotropization during de Sitter expansion

The framework connects pre-inflationary anisotropic states to late isotropic universe

A plausible scenario for the universe's early quasi-isotropic phase

Abstract

Semi-classical states for the Wheeler-DeWitt equation of a Bianchi type I model in the presence of a scalar field are analyzed. It is outlined how this scheme can effectively describe more general situations, where the curvature of the Bianchi type IX model and a proper potential term for the scalar field are present. The introduction of a cosmological constant term accounts for the quasi-isotropization mechanism which bridges the proposed framework with a late isotropic phase. This result makes the semi-classical Bianchi I model a plausible scenario for the Universe pre-inflationary phase.