Superpositions of the cosmological constant allow for singularity resolution and unitary evolution in quantum cosmology

TL;DR

This paper introduces a new quantization method that enables superpositions of the cosmological constant, leading to singularity resolution and unitary evolution in quantum cosmology models, with implications for cosmic bounce phenomena.

Contribution

The paper presents a novel quantization approach allowing superpositions of the cosmological constant, ensuring singularity resolution and unitarity in isotropic quantum cosmological models.

Findings

Superpositions of the cosmological constant enable singularity resolution.

Solutions exhibit unitary evolution in quantum cosmology.

Cosmic bounce features are robust against Planck-scale physics.

Abstract

A novel approach to quantization is shown to allow for superpositions of the cosmological constant in isotropic and homogeneous mini-superspace models. Generic solutions featuring such superpositions display unitary evolution and resolution of the classical singularity. Physically well-motivated cosmological solutions are constructed. These particular solutions exhibit characteristic features of a cosmic bounce including universal phenomenology that can be rendered insensitive to Planck-scale physics in a natural manner.