Sensitivity below the standard quantum limit in gravitational wave detectors with Michelson-Fabry-Perot readout

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dc.creatorBelfi, J.
dc.creatorMarin, F.
dc.date2008-02-05
dc.date.accessioned2026-07-07T11:40:08Z
dc.date.available2026-07-07T11:40:08Z
dc.descriptionWe calculate the quantum noise limited displacement sensitivity of a Michelson-Fabry-Perot (MFP) with detuned cavities, followed by phase-sensitive homodyne detection. We show that the standard quantum limit can be surpassed even with resonant cavities and without any signal-recycling mirror nor additional cavities. Indeed, thanks to the homodyne detection, the output field quadrature can be chosen in such a way to cancel the effect of input amplitude fluctuations, i.e., eliminating the force noise. With detuned cavities, the modified opto-mechanical susceptivity allows to reach unlimited sensitivity for large enough (yet finite) optical power. Our expressions include mirror losses and cavity delay effect, for a realistic comparison with experiments. Our study is particularly devoted to gravitational wave detectors and we consider both an interferometer with free-falling mirrors, and a MFP as readout for a massive detector. In the latter case, the sensitivity curve of the recently conceived 'DUAL' detector, based on two acoustic modes, is obtained.
dc.identifierhttps://arxiv.org/abs/0802.0668
dc.identifierhttp://arxiv.org/abs/0802.0668
dc.identifierPhys.Rev.D77:122002,2008
dc.identifierdoi:10.1103/PhysRevD.77.122002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200160
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleSensitivity below the standard quantum limit in gravitational wave detectors with Michelson-Fabry-Perot readout
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