The universe as a quantum gravity condensate

TL;DR

This paper introduces a group field theory approach to quantum gravity, viewing cosmology as emergent hydrodynamics of fundamental quantum degrees of freedom, and discusses recent results like bouncing cosmology.

Contribution

It presents a novel framework linking quantum gravity condensates to cosmological dynamics, including emergent bouncing universe scenarios.

Findings

Emergence of bouncing cosmology from group field theory models

Cosmology as hydrodynamics of quantum gravity condensates

Survey of recent related research

Abstract

This is an introduction to the approach to the extraction of cosmological dynamics from full quantum gravity based on group field theory condensates. We outline its general perspective, which sees cosmology as the hydrodynamics of the fundamental quantum gravity degrees of freedom, as well as its concrete implementation within the group field theory formalism. We summarise recent work showing the emergence of a bouncing cosmological dynamics from a fundamental group field theory model, and provide a brief but complete survey of other results in the literature. Finally, we discuss open issues and directions for further research.