A radio-frequency Bose–Einstein condensate magnetometer

Abstract

We report on a radio frequency magnetometer employing a Bose–Einstein condensate of 87Rb atoms held in a dipole trap. An AC sensitivity of [Formula: see text] is achieved at a probing volume of [Formula: see text], leading to a volume-normalized sensitivity of [Formula: see text]. At larger probing volumes with the atoms released from the magnetic trap used in the initial phase of the evaporation sequence, the AC sensitivity is improved to [Formula: see text], allowing a two-mode approach for applications requiring improved sensitivity. Immediate application in high-resolution electromagnetic induction imaging is expected when compared to performance of other induction-based imaging platforms.

A review of fiber‐coupled atomic magnetometer

“…10 Thus, spatial resolution is a key factor limiting the magnetoencephalography images and an important indicator for the measurement system. 11 Nitrogen-vacancy diamond magnetometers 12 and atomic magnetometers (AMs) based on ultracold atoms 13 are ideally suited for high-resolution mapping with smaller probing volumes, but the operating frequency is in the range of radio frequency. The current magnetoencephalography (MEG) system mainly adopts spin-exchange relaxation-free (SERF) AM 14,15 and superconducting quantum interferometer (SQUID) magnetometer 16 operating at low frequency.…”