Acoustic frequency atomic spin oscillator in the quantum regime.

Autor: Jia J; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark., Novikov V; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.; Russian Quantum Center, Skolkovo, Moscow, Russia., Brasil TB; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark., Zeuthen E; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark., Müller JH; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark., Polzik ES; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark. polzik@nbi.ku.dk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Oct 12; Vol. 14 (1), pp. 6396. Date of Electronic Publication: 2023 Oct 12.
DOI: 10.1038/s41467-023-42059-y
Abstrakt: Quantum noise reduction and entanglement-enhanced sensing in the acoustic frequency range is an outstanding challenge relevant for a number of applications including magnetometry and broadband noise reduction in gravitational wave detectors. Here we experimentally demonstrate quantum behavior of a macroscopic atomic spin oscillator in the acoustic frequency range. Quantum back-action of the spin measurement, ponderomotive squeezing of light, and virtual spring softening are observed at oscillation frequencies down to the sub-kHz range. Quantum noise sources characteristic of spin oscillators operating in the near-DC frequency range are identified and means for their mitigation are presented.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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