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  Dynamical sensitivity control of a single-spin quantum sensor.

Lazariev, A., Arroyo Camejo, S., Rahane, G., Kavatamane, V. K., & Balasubramanian, G. (2017). Dynamical sensitivity control of a single-spin quantum sensor. Scientific Reports, 7: 6586. doi:10.1038/s41598-017-05387-w.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-B019-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-3014-2
Genre: Journal Article

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 Creators:
Lazariev, A.1, Author              
Arroyo Camejo, S.2, Author              
Rahane, G.1, Author              
Kavatamane, V. K.1, Author              
Balasubramanian, G.1, Author              
Affiliations:
1Research Group of Nanoscale Spin Imaging, MPI for Biophysical Chemistry, Max Planck Society, ou_1113579              
2Department of NanoBiophotonics, MPI for Biophysical Chemistry, Max Planck Society, ou_578627              

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 Abstract: The Nitrogen-Vacancy (NV) defect in diamond is a unique quantum system that offers precision sensing of nanoscale physical quantities at room temperature beyond the current state-of-the-art. The benchmark parameters for nanoscale magnetometry applications are sensitivity, spectral resolution, and dynamic range. Under realistic conditions the NV sensors controlled by conventional sensing schemes suffer from limitations of these parameters. Here we experimentally show a new method called dynamical sensitivity control (DYSCO) that boost the benchmark parameters and thus extends the practical applicability of the NV spin for nanoscale sensing. In contrast to conventional dynamical decoupling schemes, where π pulse trains toggle the spin precession abruptly, the DYSCO method allows for a smooth, analog modulation of the quantum probe's sensitivity. Our method decouples frequency selectivity and spectral resolution unconstrained over the bandwidth (1.85 MHz-392 Hz in our experiments). Using DYSCO we demonstrate high-accuracy NV magnetometry without |2π| ambiguities, an enhancement of the dynamic range by a factor of 4 · 103, and interrogation times exceeding 2 ms in off-the-shelf diamond. In a broader perspective the DYSCO method provides a handle on the inherent dynamics of quantum systems offering decisive advantages for NV centre based applications notably in quantum information and single molecule NMR/MRI.

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Language(s): eng - English
 Dates: 2017-07-26
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/s41598-017-05387-w
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Title: Scientific Reports
Source Genre: Journal
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Pages: 11 Volume / Issue: 7 Sequence Number: 6586 Start / End Page: - Identifier: -