Physics
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..92p1102m&link_type=abstract
Physical Review Letters, vol. 92, Issue 16, id. 161102
Physics
13
Gravitational Wave Detectors And Experiments, Interferometers, Quantum Fluctuations, Quantum Noise, And Quantum Jumps
Scientific paper
We present results that are a classical analog to quantum noise cancellation. It is possible to breach the standard quantum limit in an interferometer by the use of squeezing to correlate orthogonal quadratures of quantum noise, causing their effects on the resulting sensitivity to cancel. A laser beam incident on a Fabry-Perot cavity was imprinted with classical, correlated noise in the same quadratures that cause shot noise and radiation pressure noise. Couplings between these quadratures due to a movable mirror, sensitive to radiation pressure, cause the excess classical noise to cancel. This cancellation was shown to improve the signal to noise ratio of an injected signal by approximately a factor of10.
Gray Malcolm B.
McClelland David E.
Mow-Lowry Conor M.
Sheard Benjamin S.
Whitcomb Stan E.
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