Journal
APPLIED PHYSICS LETTERS
Volume 115, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5129547
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Funding
- National Key Research and Development Program of China [2017YFA0304201]
- National Natural Science Foundation of China [11925401, 11734008, 11974115, 11704126]
- Program of Shanghai Subject Chief Scientist [17XD1401500]
- Shanghai Committee of Science and Technology [17JC1400500]
- Natural Science Foundation of Shanghai [17ZR1443100]
- Shanghai Sailing Program [17YF1403900]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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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/root 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. Published under license by AIP Publishing.
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