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Magnetometry with a space-based differential atom interferometer
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DOI：10.1038/s41467-026-75230-2.png)
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Abstract
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Atom interferometers deployed in space are excellent tools for high precision measurements, navigation, or Earth observation. In particular, differential interferometric setups feature common-mode noise suppression and enable reliable measurements in the presence of ambient platform noise. Here we report on orbital magnetometry campaigns performed with differential single- and double-loop interferometers in NASA’s Cold Atom Lab aboard the International Space Station. By comparing measurements with atoms in magnetically sensitive and insensitive states, we have realized atomic magnetometers mapping magnetic field curvatures. Our results pave the way towards precision quantum sensing missions in space. Atom-interferometers-based quantum sensors in space promise high-precision fundamental physics tests and geophysical applications. Here, the authors demonstrate the measurement of magnetic field curvatures via differential Bose-Einstein condensate interferometers at the NASA Cold Atom Laboratory aboard the International Space Station, by suppressing the effect of vibrational noise and improving atom source control.
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