# Comparative Penning-Trap Tests of Lorentz and CPT Symmetry

## TL;DR

This paper reviews Penning trap experiments testing Lorentz and CPT symmetry, highlighting recent measurements that significantly tighten constraints on possible violations in quantum electrodynamics.

## Contribution

It provides a comprehensive review of theoretical and experimental efforts in Penning traps, emphasizing new results that improve bounds on Lorentz and CPT violation coefficients.

## Key findings

- Recent measurements of proton and antiproton magnetic moments greatly improve constraints.
- Constraints on Lorentz and CPT violation coefficients are enhanced by factors up to 3000.
- The work discusses prospects for future tests in Penning trap experiments.

## Abstract

The theoretical and experimental prospects for Lorentz- and CPT-violating quantum electrodynamics in Penning traps are reviewed in this work. With the recent reported results for the measurements of magnetic moments for both protons and antiprotons, improvements with factors of up to 3000 for the constraints of various coefficients for Lorentz and CPT violation are obtained.