Spatially-selective in situ magnetometry of ultracold atomic clouds

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review


We demonstrate novel implementations of high-precision optical magnetometers which allow for spatially-selective and spatially-resolved in situ measurements using cold atomic clouds. These are realised by using shaped dispersive probe beams combined with spatially-resolved balanced homodyne detection. Two magnetometer sequences are discussed: a vectorial magnetometer, which yields sensitivities two orders of magnitude better compared to a previous realisation and a Larmor magnetometer capable of measuring absolute magnetic fields. We characterise the dependence of single-shot precision on the size of the analysed region for the vectorial magnetometer and provide a lower bound for the measurement precision of magnetic field gradients for the Larmor magnetometer. Finally, we give an outlook on how dynamic trapping potentials combined with selective probing can be used to realise enhanced quantum simulations in quantum gas microscopes.

Original languageEnglish
Article number075003
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Number of pages9
Publication statusPublished - Apr 2019

    Research areas

  • Faraday effect, dispersive probing, magnetometry, optical tweezers, spatial light modulation, ultracold quantum gases

See relations at Aarhus University Citationformats

ID: 146030493