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Klaus Mølmer

Magnetic Resonance with Squeezed Microwaves

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DOI

  • A. Bienfait, Quantronics Group, SPEC, CEA, CNRS, Université Paris-Saclay, Frankrig
  • P. Campagne-Ibarcq, Quantronics Group, SPEC, CEA, CNRS, Université Paris-Saclay, Frankrig
  • A. H. Kiilerich
  • ,
  • X. Zhou, Quantronics Group, SPEC, CEA, CNRS, Université Paris-Saclay
  • ,
  • S. Probst, CNRS Centre National de la Recherche Scientifique
  • ,
  • J. J. Pla, School of Electrical Engineering and Telecommunications, University of New South Wales, Australien
  • T. Schenkel, Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, USA
  • D. Vion, CNRS Centre National de la Recherche Scientifique
  • ,
  • D. Esteve, Quantronics Group, SPEC, CEA, CNRS, Université Paris-Saclay
  • ,
  • J. J. L. Morton, London Centre for Nanotechnology, University College London, Storbritannien
  • K. Moelmer
  • P. Bertet, Quantronics Group, SPEC, CEA, CNRS, Université Paris-Saclay, Frankrig

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.

OriginalsprogEngelsk
Artikelnummer041011
TidsskriftPhysical Review X
Vol/bind7
Nummer4
Antal sider11
ISSN2160-3308
DOI
StatusUdgivet - 17 okt. 2017

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