On the relation between boundary proposals and hidden symmetries of the extended pre-big bang quantum cosmology

TL;DR

This paper extends a quantum cosmology framework linking boundary conditions to hidden symmetries, now including scalar-tensor theories with a cosmological constant, to better understand boundary selection in pre-big bang models.

Contribution

It broadens the existing framework to incorporate realistic matter fields, specifically scalar-tensor theories with a cosmological constant, and explores how hidden symmetries influence boundary condition choices.

Findings

Hidden minisuperspace symmetries suggest boundary condition selection processes.

The extended framework applies to scalar-tensor theories with a cosmological constant.

The approach enhances understanding of boundary conditions in quantum cosmology.

Abstract

A framework associating quantum cosmological boundary conditions to minisuperspace hidden symmetries has been introduced in \cite{7}. The scope of the application was, notwithstanding the novelty, restrictive because it lacked a discussion involving realistic matter fields. Therefore, in the herein letter, we extend the framework scope to encompass elements from a scalar-tensor theory in the presence of a cosmological constant. More precisely, it is shown that hidden minisuperspace symmetries present in a pre-big bang model suggest a process from which boundary conditions can be selected.