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Magnetic Resonance with Squeezed Microwaves

Bienfait, A; Campagne-Ibarcq, P; Kiilerich, AH; Zhou, X; Probst, S; Pla, JJ; Schenkel, T; ... Bertet, P; + view all (2017) Magnetic Resonance with Squeezed Microwaves. Physical Review X , 7 (4) , Article 041011. 10.1103/PhysRevX.7.041011. Green open access

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Vacuum fluctuations of the electromagnetic field set a fundamental limit to the sensitivity of a variety of measurements, including magnetic resonance spectroscopy. We report the use of squeezed microwave fields, which are engineered quantum states of light for which fluctuations in one field quadrature are reduced below the vacuum level, to enhance the detection sensitivity of an ensemble of electronic spins at millikelvin temperatures. By shining a squeezed vacuum state on the input port of a microwave resonator containing the spins, we obtain a 1.2-dB noise reduction at the spectrometer output compared to the case of a vacuum input. This result constitutes a proof of principle of the application of quantum metrology to magnetic resonance spectroscopy.

Type: Article
Title: Magnetic Resonance with Squeezed Microwaves
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevX.7.041011
Publisher version: http://doi.org/10.1103/PhysRevX.7.041011
Language: English
Additional information: Copyright © Authors 2017. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Keywords: Magnetism, Quantum Physics,Quantum Information
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10033899
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