Quantum gravity and spacetime symmetries

TL;DR

This paper reviews potential Planck-scale signals of quantum gravity through small violations of spacetime symmetries, discussing their theoretical origins, effective descriptions, experimental tests, and expected sensitivities.

Contribution

It provides a comprehensive overview of how spacetime symmetry violations can emerge in quantum gravity and their detectability in current and upcoming experiments.

Findings

Violations can arise in various quantum gravity approaches

Effective field theories can describe low-energy symmetry violations

Current experiments have promising sensitivities to detect such effects

Abstract

Small violations of spacetime symmetries have recently been identified as promising Planck-scale signals. This talk reviews how such violations can arise in various approaches to quantum gravity, how the emergent low-energy effects can be described within the framework of relativistic effective field theories, how suitable tests can be identified, and what sensitivities can be expected in current and near-future experiments.