Backaction-evading impulse measurement with mechanical quantum sensors

Journal Article · Fri Aug 21 00:00:00 EDT 2020 · Phys.Rev.A

DOI:https://doi.org/10.1103/PhysRevA.102.023525· OSTI ID:1574959

Ghosh, Sohitri ^[1]; Carney, Daniel ^[2]; Shawhan, Peter ^[3]; Taylor, Jacob M. ^[1]

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1. Joint Quantum Inst., College Park
2. Fermilab; Joint Quantum Inst., College Park
3. Maryland U.

The quantum measurement of any observable naturally leads to noise added by the act of measurement. Approaches to evade or reduce this noise can lead to substantial improvements in a wide variety of sensors, from laser interferometers to precision magnetometers and more. In this paper, we develop a measurement protocol based upon pioneering work by the gravitational wave community which allows for reduction of added noise from measurement by coupling an optical field to the momentum of a small mirror. As a specific implementation, we present a continuous measurement protocol using a double-ring optomechanical cavity. We demonstrate that, with experimentally relevant parameters, this protocol can lead to significant backaction noise evasion, yielding measurement noise below the standard quantum limit over many decades of frequency.

• Research Organization: Maryland U.; Joint Quantum Inst., College Park; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: US Department of Energy
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1574959
• Report Number(s): FERMILAB-PUB-19-537-T; oai:inspirehep.net:1761440; arXiv:1910.11892
• Journal Information: Phys.Rev.A, Journal Name: Phys.Rev.A Journal Issue: 2 Vol. 102
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Optomechanics
Quantum optics