Faraday spectroscopy of atoms confined in a dark optical trap

Abstract

We demonstrate Faraday spectroscopy with high duty cycle and sampling rate using atoms confined to a blue-detuned optical trap. Our trap consists of a crossed pair of high-charge-number hollow laser beams, which forms a dark, box-like potential. We have used this to measure transient magnetic fields in a 500-micron-diameter spot over a 400 ms time window with nearly unit duty cycle at a 500 Hz sampling rate. We use these measurements to quantify and compensate time-varying magnetic fields to ~10 nT per time sample.

arXiv comment6 pages, 8 figures Accepted in Phys. Rev. A

References in corpus (15)

• Resonant nonlinear magneto-optical effects in atoms
• An Atom Michelson Interferometer on a Chip Using a Bose-Einstein Condensate
• High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
• A high-accuracy algorithm for designing arbitrary holographic atom traps
• Quantum Control of the Hyperfine Spin of a Cs Atom Ensemble
• Continuous Weak Measurement and Nonlinear Dynamics in a Cold Spin Ensemble
• Sensing electric and magnetic fields with Bose-Einstein Condensates
• Cold atom confinement in an all-optical dark ring trap
• Large Faraday rotation of resonant light in a cold atomic cloud
• Suppression of Spin Projection Noise in Broadband Atomic Magnetometry
• Faraday spectroscopy in an optical lattice: a continuous probe of atom dynamics
• A single hollow beam optical trap for cold atoms
• Deeply subrecoil two-dimensional Raman cooling
• Hyperfine Spectroscopy of Optically Trapped Atoms
• Magnetically-controlled velocity selection in a cold atom sample using stimulated Raman transitions

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• In-Situ Dual-Port Polarization Contrast Imaging of Faraday Rotation in a High Optical Depth Ultracold 87Rb Atomic Ensemble
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