Big Bounce in Dipole Cosmology

TL;DR

This paper derives a Big Bounce cosmological model from Loop Quantum Gravity's dipole approximation, showing non-singular evolution and semi-classical properties preservation across the bounce, linking Loop Quantum Cosmology to the full theory.

Contribution

It introduces a Big Bounce scenario within dipole cosmology, demonstrating non-singular evolution for all matter fields and semi-classical property preservation across the bounce.

Findings

Non-singular cosmological evolution with matter fields.

Semi-classical properties are preserved across the bounce.

Strengthens the connection between Loop Quantum Cosmology and Loop Quantum Gravity.

Abstract

We derive the cosmological Big Bounce scenario from the dipole approximation of Loop Quantum Gravity. We show that a non-singular evolution takes place for any matter field and that, by considering a massless scalar field as a relational clock for the dynamics, the semi-classical proprieties of an initial state are preserved on the other side of the bounce. This model thus enhances the relation between Loop Quantum Cosmology and the full theory.