%0 Journal Article
%T Real-time vector field tracking with a cold-atom magnetometer
%A Naeimeh Behbood
%A Ferran Martin Ciurana
%A Giorgio Colangelo
%A Mario Napolitano
%A Morgan W. Mitchell
%A Robert J. Sewell
%J Physics
%D 2013
%I arXiv
%R 10.1063/1.4803684
%X We demonstrate a fast three-axis optical magnetometer using cold, optically-trapped $^{87}$Rb gas as a sensor. By near-resonant Faraday rotation we record the free-induction decay following optical pumping along two orthogonal axes to obtain the three field components and one gradient component. A single measurement achieves shot-noise limited sub-nT sensitivity in 1 ms, with transverse spatial resolution of $\sim$ 20 $\mu$m. We make a detailed analysis of the shot-noise-limited sensitivity.
%U http://arxiv.org/abs/1303.2312v2