Cavity-enhanced microwave readout of a solid-state spin sensor
Name
s41467-021-21256-7.pdf
Description
Published version
Size
1.92 MB
Format
Adobe PDF
Checksum (MD5)
1b91a4a964f758e61d587f065e6e2a61
Author(s)
Eisenach, Erik R
Barry, John F
O’Keeffe, Michael F
Schloss, Jennifer M
Steinecker, Matthew H
Englund, Dirk R
Braje, Danielle A
Date Issued
2021
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Eisenach, Erik R, Barry, John F, O’Keeffe, Michael F, Schloss, Jennifer M, Steinecker, Matthew H et al. 2021. "Cavity-enhanced microwave readout of a solid-state spin sensor." Nature Communications, 12 (1).
Version
Final published version
Abstract
Overcoming poor readout is an increasingly urgent challenge for devices based on solid-state spin defects, particularly given their rapid adoption in quantum sensing, quantum information, and tests of fundamental physics. However, in spite of experimental progress in specific systems, solid-state spin sensors still lack a universal, high-fidelity readout technique. Here we demonstrate high-fidelity, room-temperature readout of an ensemble of nitrogen-vacancy centers via strong coupling to a dielectric microwave cavity, building on similar techniques commonly applied in cryogenic circuit cavity quantum electrodynamics. This strong collective interaction allows the spin ensemble’s microwave transition to be probed directly, thereby overcoming the optical photon shot noise limitations of conventional fluorescence readout. Applying this technique to magnetometry, we show magnetic sensitivity approaching the Johnson–Nyquist noise limit of the system. Our results pave a clear path to achieve unity readout fidelity of solid-state spin sensors through increased ensemble size, reduced spin-resonance linewidth, or improved cavity quality factor.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
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Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41467-021-21256-7
