# A Cold Atom Radio-Frequency Magnetometer

## TL;DR

This paper introduces a compact, high-sensitivity cold atom radio-frequency magnetometer using laser-cooled rubidium-87, achieving performance comparable to larger systems in unshielded environments.

## Contribution

It presents a novel, simple design for a cold atom RF magnetometer that combines laser cooling with radio-frequency techniques for enhanced sensitivity and robustness.

## Key findings

- Sensitivity of 330 pT/√Hz achieved
- Operates effectively in unshielded environments
- Potential for high spatial resolution applications

## Abstract

We propose and demonstrate a radio-frequency atomic magnetometer with sub-Doppler laser cooled rubidium-87. With a simple and compact design, our system demonstrates a sensitivity of $330~pT/\sqrt{Hz}$ in an unshielded environment, thus matching or surpassing previously reported cold atoms designs. By merging the multiple uses and robustness of radio-frequency atomic magnetometers with the detailed control of laser cooling, our cold atom radio-frequency magnetometer has the potential to move applications of atomic magnetometry to high spatial resolution. Direct impact in metrology for applied sciences, materials characterization, and nanotechnology can be anticipated.