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Strong thermomechanical noise squeezing stabilized by feedback

Year: 2025
Type: article
Abstract: Squeezing the quadrature noise of a harmonic oscillator enhances its sensitivity. Stabilization of the antisqueezed quadrature can overcome the 3 dB squeezing limit by parametric modulation. Here, we apply this method to soft-clamped membrane resonators, which hold promise for both classical and quantum sensing applications. We compare piezoelectric and capacitive parametric modulation and observe thermomechanical squeezing by up to 17 and 21 dB, respectively. Finally, we provide a full quantum theory of combining this approach with quantum-limited motion measurement. We conclude that quantum squeezing is feasible at moderate cryogenic temperatures and realistic device parameters.
DOI: 10.1103/physrevresearch.7.l012071
Authors: Aida Mashaal, Lucio Stefan, Andrea Ranfagni, Letizia Catalini, Ilia Chernobrovkin, Thibault Capelle, Eric C. Langman, Albert Schliesser
Language: English
Open Access status: gold
Estimated APC paid: $2,625
Funders: European Commission, Novo Nordisk, Danmarks Frie Forskningsfond, Novo Nordisk Fonden, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions
OpenAlex ID: W4408507728
FWCI: 1.841
Cites: 33
Cited by: 5
Related to: 10