Real-time vector field tracking with a cold-atom magnetometer

Abstract

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.

4 pages, 3 figures

References in corpus (4)

• Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock
• High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
• Single Ion Quantum Lock-In Amplifier
• Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half

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