Comagnetometry using mirror-symmetric ions in a crystal

TL;DR

This paper introduces a novel solid-state comagnetometer using nuclear spins in a crystal, effectively rejecting magnetic field noise and enhancing the potential for detecting new physics beyond the Standard Model.

Contribution

It demonstrates a new type of comagnetometer with mirror-symmetric ions in a crystal, achieving high magnetic noise rejection for precision physics experiments.

Findings

Rejection of magnetic-field-induced shifts better than 1 part in 10^5

Comparison of four ion sub-ensembles in a crystal

Foundation for improved searches of time-reversal symmetry violation

Abstract

Searches for physics beyond the Standard Model using spin sensors are susceptible to spurious frequency shifts and noise due to magnetic fields. Therefore a comagnetometer -- an auxiliary sensor that allows mundane magnetic field effects to be differentiated from new physics -- is an essential feature of many precision searches. Here we demonstrate the operation of a novel type of comagnetometer using nuclear spins of dopant ions in a crystal, comparing four different sub-ensembles of ions. We demonstrate rejection of magnetic-field-induced shifts to better than 1 part in 10$^5$ using this system, laying the groundwork for improved searches of time-reversal symmetry violation using solid-state systems.