Quantum gravity phenomenology via Lorentz violations

TL;DR

This paper discusses how recent experimental constraints on Lorentz symmetry violations provide new avenues for testing quantum gravity theories and offer insights into the fundamental nature of gravity.

Contribution

It reviews recent progress in constraining Lorentz violations inspired by quantum gravity, highlighting the potential for experimental tests to inform quantum gravity models.

Findings

Lorentz violations can be constrained using current experiments.

Experimental tests are increasingly probing quantum gravity effects.

Constraints provide insights into the fundamental nature of gravity.

Abstract

The search for a quantum theory of gravity has been one of the main aims of theoretical physics for many years by now. However the efforts in this direction have been often hampered by the lack of experimental/observational tests able to select among, or at least constrain, the numerous quantum gravity models proposed so far. This situation has changed in the last decade thanks to the realization that some QG inspired violations of Lorentz symmetry could be constrained using current experiments and observations. This study it is not only allowing us to test at higher and higher energies a fundamental symmetry of spacetime but it is also providing us with hints and perspectives about the fundamental nature of gravity.