Published October 17, 2017
| Version v1
Journal article
Open
Magnetic resonance with squeezed microwaves
Creators
- 1. University of Chicago
- 2. Université Paris-Saclay
- 3. Aarhus University
- 4. University of New South Wales
- 5. Lawrence Berkeley National Laboratory
- 6. University College London
Description
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.
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PhysRevX.7.041011.pdf
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Additional details
Identifiers
- DOI
- 10.1103/PhysRevX.7.041011
- Other
- oai:uchicago.tind.io:11425
Funding
- U.S. Department of Energy
- DE-AC02-05CH11231
- Villum Fonden
- Seventh Framework Programme
- 279781
- Royal Society
- European Research Council
- Agence Nationale de la Recherche
- Seventh Framework Programme
- 615767
- Seventh Framework Programme
- 630070
- Engineering and Physical Sciences Research Council
- EP/H025952/1
- Engineering and Physical Sciences Research Council
- EP/H025952/2
- Engineering and Physical Sciences Research Council
- EP/K025945/1
- Engineering and Physical Sciences Research Council
- EP/I035536/1
- Engineering and Physical Sciences Research Council
- EP/I035536/2