Twin-beam-enhanced displacement measurement of a membrane in a cavity
Abstract
We report an experimental demonstration of quantum-enhanced displacement measurement of a membrane in an optical cavity by using bright quantum correlated light to surpass the shot-noise limit (SNL). The optical cavity enhances the displacement signal and the twin beams suppress the noise background 3 dB below the SNL at an equivalent optical power. Thus, the signal-to-noise ratio is significantly improved by simultaneously using optical cavities and twin beams, and a sensitivity of 200 am / √{ Hz } is achieved. The frequency fluctuations of twin beams are analyzed and reduced by using optical twin cavities. These results provide a useful method for precision measurements as well as to control cavity optomechanical systems with nonclassical light.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 2019
- DOI:
- 10.1063/1.5129547
- arXiv:
- arXiv:1902.04288
- Bibcode:
- 2019ApPhL.115y1105W
- Keywords:
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- Physics - Optics;
- Physics - Atomic Physics;
- Physics - Instrumentation and Detectors
- E-Print:
- doi:10.1063/1.5129547