# Quantum Gravity and Cosmology: an intimate interplay

## TL;DR

This paper explores the interplay between quantum gravity theories and cosmological models, highlighting advances in string/brane cosmology, group field theory, and non-commutative geometry, to address fundamental questions about the universe's origin and structure.

## Contribution

It presents three distinct quantum gravity-based cosmological models, demonstrating their roles in explaining early universe phenomena and fundamental physics.

## Key findings

- Vector field influences in string/brane cosmology
- Resolution of big bang singularity via group field theory
- Geometric explanation for the standard model from non-commutative geometry

## Abstract

I will briefly discuss three cosmological models built upon three distinct quantum gravity proposals. I will first highlight the cosmological role of a vector field in the framework of a string/brane cosmological model. I will then present the resolution of the big bang singularity and the occurrence of an early era of accelerated expansion of a geometric origin, in the framework of group field theory condensate cosmology. I will then summarise results from an extended gravitational model based on non-commutative spectral geometry, a model that offers a purely geometric explanation for the standard model of particle physics.