Lorentz violation, gravitomagnetism, and intrinsic spin

TL;DR

This paper investigates potential violations of relativity through gravitomagnetic effects on intrinsic spins, using experimental data to set constraints and discussing future improvements and measurements of gravitomagnetism.

Contribution

It introduces new constraints on relativity-violating effects via gravitomagnetism and analyzes how upcoming experiments can enhance sensitivity to these effects.

Findings

Existing experiments constrain two new combinations of effects at 10% level

Planned improvements will match the sensitivity of current best tests

Prospects for measuring the standard gravitomagnetic effect are discussed

Abstract

A largely unconstrained set of relativity-violating effects is studied via the gravitomagnetic effect on intrinsic spins. The results of existing comagnetometer experiments are used to place constraints on two new combinations of these effects at the 10% level. We show that planned improvements in these experiments will make them competitive with the best existing sensitivities to this elusive class of relativity-violating effects. Prospects for measuring the conventional General-Relativistic gravitomagnetic effect are also considered.