Surpassing the Amplifier Limit for Force Detection
- 17 May 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 48 (20) , 1371-1374
- https://doi.org/10.1103/physrevlett.48.1371
Abstract
A force-measuring system composed of a macroscopic harmonic oscillator, mechanical-electrical transducer, and linear amplifier is described and the sensitivity is calculated for a "back-action evasion" mode of operation. It is shown that it is possible to surpass the standard amplifier limit with this device, and the specific requirements to do so are given. These results may also apply to a quantum-limited amplifier and thus give the requirements to perform quantum-nondemolition measurements.Keywords
This publication has 4 references indexed in Scilit:
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- Quantum Nondemolition MeasurementsScience, 1980
- On the measurement of a weak classical force coupled to a quantum-mechanical oscillator. I. Issues of principleReviews of Modern Physics, 1980
- Ultimate sensitivity limit of a resonant gravitational wave antenna using a linear motion detectorPhysical Review D, 1976