Mechanical parametric amplification and thermomechanical noise squeezing

Details Mechanical parametric amplification and thermomechanical noise squeezing Mechanical parametric amplification and thermomechanical noise squeezing

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..67..699r&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 67, Aug. 5, 1991, p. 699-702.

Astronomy and Astrophysics

Astronomy

145

Harmonic Excitation, Parametric Amplifiers, Squeezed States (Quantum Theory), Thermal Noise, Thermodynamic Equilibrium, Instrument Errors, Mechanical Oscillators, Noise Reduction, Phase Control, Signal To Noise Ratios, Mechanical And Elastic Waves, Vibrations, Measurements Common To Several Branches Of Physics And Astronomy

Scientific paper

A mechanical degenerate parametric amplified has been devised which greatly increases the motional response of a microcantilever for small harmonic force excitations. The amplifier can improve force detection sensitivity for measurements dominated by sensor noise or backaction effects and can also produce mechanical squeezed states. In an initial squeezing demonstration, the thermal noise (Brownian motion) of the cantilever was reduced in one phase by 4.9 dB.

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