Continuous Comagnetometry using Transversely Polarized Xe Isotopes

TL;DR

This paper introduces a novel transversely polarized noble gas comagnetometer that minimizes systematic errors and achieves high sensitivity for detecting non-magnetic spin-dependent interactions.

Contribution

It presents a new method for continuous comagnetometry using transversely polarized Xe isotopes, improving error suppression and measurement stability.

Findings

Achieved a sensing bandwidth of 1 Hz.

White-noise level of 7 μHz/√Hz.

Bias stability of approximately 1 μHz.

Abstract

We demonstrate a transversely polarized spin-exchange pumped noble gas comagnetometer which suppresses systematic errors from longitudinal polarization. Rb atoms as well as $^{131}$Xe and $^{129}$Xe nuclei are simultaneously polarized perpendicular to a pulsed bias field. Both Xe isotopes' nuclear magnetic resonance conditions are simultaneously satisfied by frequency modulation of the pulse repetition rate. The Rb atoms detect the Xe precession. We highlight the importance of magnetometer phase shifts when performing comagnetometry. For detection of non-magnetic spin-dependent interactions the sensing bandwidth is 1 Hz, the white-noise level is 7 $\mu$Hz /$\sqrt{\text{Hz}}$, and the bias stability is $\approx1$ $\mu$Hz.