Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session B03: Magnetometry, Atom Interferometry, Gravimetry
10:45 AM–12:45 PM,
Tuesday, June 4, 2024
Room: 201A
Chair: Subhadeep Gupta, University of Washington
Abstract: B03.00003 : Vector magnetometry in an alkali vapor cell using radio frequency Rabi oscillations*
11:09 AM–11:21 AM
Presenter:
Thanmay Sunil Menon
(University of Colorado, Boulder)
Authors:
Thanmay Sunil Menon
(University of Colorado, Boulder)
Christopher H Kiehl
(University of Colorado, Boulder)
Tobias Thiele
(Zurich Instruments)
Svenja Knappe
(University of Colorado, Boulder)
Cindy A Regal
(University of Colorado, Boulder)
An alternate approach uses electromagnetic fields as a reference. In previous work, we demonstrated vector and scalar magnetometry by exciting Rabi oscillations between ground state hyperfine manifolds with self-calibrating microwave polarization ellipses (PEs) using 87Rb, both with cold atoms [1] and in a hot vapor cell [2]. In this talk, I will describe our recent work on using radio frequency (RF) PEs to drive Rabi oscillations between Zeeman levels within hyperfine manifolds. Unlike hyperfine transitions, Zeeman transitions are less affected by spin-exchange decoherence, improving vector sensitivity. Moreover, 3D RF coils allow compact packaging with fast and flexible field control, enabling real-time calibration of PEs and compensation of drifts. We determine the DC field direction by measuring 𝜎± Rabi frequencies, while its magnitude comes from Larmor precession measurements.
*This work was supported by DARPA through ARO grant numbers W911NF-21-1-0127 and W911NF-19 -1-0330, NSF QLCI Award OMA - 2016244, and the Baur-SPIE Endowed Professor at JILA.
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