Energy scale of the Big Bounce

TL;DR

This paper investigates the big-bounce transition in Loop Quantum Cosmology using an alternative quantization method, highlighting the need for observational data to determine the energy scale of the bounce.

Contribution

It introduces a new canonical quantization approach for LQC, enabling analysis of physical spectra and emphasizing the role of observational input in energy scale determination.

Findings

The quantization method allows spectral analysis of physical observables.

The energy scale of the big bounce cannot be fixed solely by loop geometry.

Observational cosmology is necessary to determine the bounce energy scale.

Abstract

We examine the nature of the cosmological big-bounce (BB) transition within the loop geometry underlying Loop Quantum Cosmology (LQC) at classical and quantum levels. Our canonical quantization method is an alternative to the standard LQC. Our method opens the door for analyzes of spectra of physical observables like energy density and volume operator. We find that one cannot determine the energy scale specific to BB by making use of the loop geometry without an extra input from observational cosmology.