DC Quantum Magnetometry Below the Ramsey Limit
- URL: http://arxiv.org/abs/2203.14230v1
- Date: Sun, 27 Mar 2022 07:32:53 GMT
- Title: DC Quantum Magnetometry Below the Ramsey Limit
- Authors: Alexander A. Wood, Alastair Stacey, Andy M. Martin
- Abstract summary: We demonstrate quantum sensing of dc magnetic fields that exceeds the sensitivity of conventional $Tast$-limited dc magnetometry by more than an order of magnitude.
We used nitrogen-vacancy centers in a diamond rotating at periods comparable to the spin coherence time, and characterize the dependence of magnetic sensitivity on measurement time and rotation speed.
- Score: 68.8204255655161
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We demonstrate quantum sensing of dc magnetic fields that exceeds the
sensitivity of conventional $T_2^\ast$-limited dc magnetometry by more than an
order of magnitude. We used nitrogen-vacancy centers in a diamond rotating at
periods comparable to the spin coherence time, and characterize the dependence
of magnetic sensitivity on measurement time and rotation speed. Our method
up-converts only the dc field of interest and preserves the quantum coherence
of the sensor. These results definitively improve the sensitivity of a quantum
magnetometer to dc fields, an important and useful addition to the quantum
sensing toolbox.
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