Open access
Date
2017-08-30Type
- Journal Article
ETH Bibliography
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Abstract
We realize a two-qubit sensor designed for achieving high-spectral resolution in quantum sensing experiments. Our sensor consists of an active “sensing qubit” and a long-lived “memory qubit”, implemented by the electronic and the nitrogen-15 nuclear spins of a nitrogen-vacancy center in diamond, respectively. Using state storage times of up to 45 ms, we demonstrate spectroscopy of external ac signals with a line width of 19 Hz (∼2.9 ppm) and of carbon-13 nuclear magnetic resonance signals with a line width of 190 Hz (∼74 ppm). This represents an up to 100-fold improvement in spectral resolution compared to measurements without nuclear memory. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000190279Publication status
publishedExternal links
Journal / series
npj Quantum InformationVolume
Pages / Article No.
Publisher
NatureOrganisational unit
03906 - Degen, Christian / Degen, Christian
Funding
137520 - Ultra-sensitive magnetometry with single spins in diamond: Device fabrication, spin manipulation, and application to nanoscale imaging (SNF)
611143 - DIAmond Devices Enabled Metrology and Sensing (EC)
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ETH Bibliography
yes
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