Journal Article10.1103/PHYSREVA.30.2135
Phase-sensitive parametric motion transducer
Mark F. Bocko,Warren W. Johnson +1 more
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TL;DR: In this article, a parametric motion transducer that is a prototype for a "back-action-evasion" measuring device is presented, demonstrating that it has the expected phase sensitivity in its fundamental mechanical-to-electrical coupling when appropriately pumped.
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Abstract: We have built a parametric motion transducer that is a prototype for a "back-action-evasion" measuring device. Our tests demonstrate that it has the expected phase sensitivity in its fundamental mechanical-to-electrical coupling when appropriately pumped. Another test verifies the anticipated frequency and loss dependence of the coupling. A third test verifies that the absolute magnitude of coupling is reasonably close to model predictions.
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Citations
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TL;DR: In this paper, the authors introduce the concepts of electromechanical superconducting resonant circuits, a topic known as microwave cavity optomechanics, and derive in pedagogical detail the classical dynamics of a mechanical oscillator parametrically coupled to a resonant circuit.
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References
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TL;DR: In this paper, a multimode analysis of phase-sensitive linear amplifiers is presented, where a lower bound on the noise carried by one quadrature phase of a signal and a corresponding lower limit on the amount of noise that a high-gain linear amplifier must add to another is established.
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TL;DR: In this paper, the authors considered a new type of quantum nondemolition measurement called back-action-evading measurement, where the real part of the harmonic oscillator's complex amplitude is measured by a single transducer.
Quantum Nondemolition Measurements
TL;DR: In this paper, the authors describe the new electronic techniques required for quantum nondemolition measurements and the theory underlying them, which may find application elsewhere in science and technology, such as quantum chemistry, quantum optics, or atomic, nuclear, and elementary particle physics.
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A proposed back action evading read-out for a gravitational wave detector
TL;DR: In this paper, a back action evasion read out was proposed to improve the sensitivity of a capacitively coupled resonant transducer for gravitational wave detectors, and the noise can be reduced by 10 to 100 over the standard amplifier limit using detector parameters already achieved.
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