Disentangling Forms of Lorentz Violation With Complementary Clock Comparison Experiments

TL;DR

This paper demonstrates how comparing atomic clocks with different nuclei can precisely test Lorentz symmetry violations, especially disentangling relativistic effects to set unprecedented bounds in the neutron sector.

Contribution

It introduces a method to disentangle different forms of Lorentz violation using complementary clock comparison experiments with relativistic nuclear effects.

Findings

Disentangled bounds in the neutron sector reach 10^(-28) GeV.

Relativistic effects enable separation of Lorentz violation forms.

Constraints surpass previous techniques in precision.

Abstract

Atomic clock comparisons provide some of the most precise tests of Lorentz and CPT symmetries in the laboratory. With data from multiple such experiments using different nuclei, it is possible to constrain new regions of the parameter space for Lorentz violation. Relativistic effects in the nuclei allow us to disentangle forms of Lorentz violation which could not be separately measured in purely nonrelativistic experiments. The disentangled bounds in the neutron sectors are at the 10^(-28) GeV level, far better than could be obtained with any other current technique.