Optimal frequency measurements with quantum probes

Simon Schmitt; Tuvia Gefen; Daniel Louzon; Christian Osterkamp; Nicolas Staudenmaier; Johannes Lang; Matthew Markham; Alex Retzker; Liam P. McGuinness; Fedor Jelezko

doi:10.1038/s41534-021-00391-5

Optimal frequency measurements with quantum probes

Simon Schmitt, Tuvia Gefen, Daniel Louzon, Christian Osterkamp, Nicolas Staudenmaier, Johannes Lang, Matthew Markham, Alex Retzker, Liam P. McGuinness^*, Fedor Jelezko

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Precise frequency measurements are important in applications ranging from navigation and imaging to computation and communication. Here we outline the optimal quantum strategies for frequency discrimination and estimation in the context of quantum spectroscopy, and we compare the effectiveness of different readout strategies. Using a single NV center in diamond, we implement the optimal frequency discrimination protocol to discriminate two frequencies separated by 2 kHz with a single 44 μs measurement, a factor of ten below the Fourier limit. For frequency estimation, we achieve a frequency sensitivity of 1.6 µHz/Hz² for a 1.7 µT amplitude signal, which is within a factor of 2 from the quantum limit. Our results are foundational for discrimination and estimation problems in nanoscale nuclear magnetic resonance spectroscopy.

Original language	English
Article number	55
Journal	npj Quantum Information
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41534-021-00391-5
Publication status	Published - Dec 2021

Access to Document

10.1038/s41534-021-00391-5

Cite this

@article{c29e1bc629ad4feda4393956f07570a3,

title = "Optimal frequency measurements with quantum probes",

abstract = "Precise frequency measurements are important in applications ranging from navigation and imaging to computation and communication. Here we outline the optimal quantum strategies for frequency discrimination and estimation in the context of quantum spectroscopy, and we compare the effectiveness of different readout strategies. Using a single NV center in diamond, we implement the optimal frequency discrimination protocol to discriminate two frequencies separated by 2 kHz with a single 44 μs measurement, a factor of ten below the Fourier limit. For frequency estimation, we achieve a frequency sensitivity of 1.6 µHz/Hz2 for a 1.7 µT amplitude signal, which is within a factor of 2 from the quantum limit. Our results are foundational for discrimination and estimation problems in nanoscale nuclear magnetic resonance spectroscopy.",

author = "Simon Schmitt and Tuvia Gefen and Daniel Louzon and Christian Osterkamp and Nicolas Staudenmaier and Johannes Lang and Matthew Markham and Alex Retzker and McGuinness, {Liam P.} and Fedor Jelezko",

note = "Publisher Copyright: {\textcopyright} 2021, Crown.",

year = "2021",

month = dec,

doi = "10.1038/s41534-021-00391-5",

language = "English",

volume = "7",

journal = "npj Quantum Information",

issn = "2056-6387",

publisher = "Nature Partner Journals",

number = "1",

}

TY - JOUR

T1 - Optimal frequency measurements with quantum probes

AU - Schmitt, Simon

AU - Gefen, Tuvia

AU - Louzon, Daniel

AU - Osterkamp, Christian

AU - Staudenmaier, Nicolas

AU - Lang, Johannes

AU - Markham, Matthew

AU - Retzker, Alex

AU - McGuinness, Liam P.

AU - Jelezko, Fedor

PY - 2021/12

Y1 - 2021/12

N2 - Precise frequency measurements are important in applications ranging from navigation and imaging to computation and communication. Here we outline the optimal quantum strategies for frequency discrimination and estimation in the context of quantum spectroscopy, and we compare the effectiveness of different readout strategies. Using a single NV center in diamond, we implement the optimal frequency discrimination protocol to discriminate two frequencies separated by 2 kHz with a single 44 μs measurement, a factor of ten below the Fourier limit. For frequency estimation, we achieve a frequency sensitivity of 1.6 µHz/Hz2 for a 1.7 µT amplitude signal, which is within a factor of 2 from the quantum limit. Our results are foundational for discrimination and estimation problems in nanoscale nuclear magnetic resonance spectroscopy.

AB - Precise frequency measurements are important in applications ranging from navigation and imaging to computation and communication. Here we outline the optimal quantum strategies for frequency discrimination and estimation in the context of quantum spectroscopy, and we compare the effectiveness of different readout strategies. Using a single NV center in diamond, we implement the optimal frequency discrimination protocol to discriminate two frequencies separated by 2 kHz with a single 44 μs measurement, a factor of ten below the Fourier limit. For frequency estimation, we achieve a frequency sensitivity of 1.6 µHz/Hz2 for a 1.7 µT amplitude signal, which is within a factor of 2 from the quantum limit. Our results are foundational for discrimination and estimation problems in nanoscale nuclear magnetic resonance spectroscopy.

UR - http://www.scopus.com/inward/record.url?scp=85103614991&partnerID=8YFLogxK

U2 - 10.1038/s41534-021-00391-5

DO - 10.1038/s41534-021-00391-5

M3 - Article

SN - 2056-6387

VL - 7

JO - npj Quantum Information

JF - npj Quantum Information

IS - 1

M1 - 55

ER -

Optimal frequency measurements with quantum probes

Abstract

Access to Document

Other files and links

Fingerprint

Cite this