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Optical noise correlations and beating the standard quantum limit in advanced gravitational-wave detectors

MPG-Autoren
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Buonanno,  Alessandra
Theoretical Astrophysics and Relativity Group, California Institute of Technology, Pasadena, California;
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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gr-qc_0010011.pdf
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CQG_18_15_102.pdf
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Zitation

Buonanno, A., & Chen, Y. (2001). Optical noise correlations and beating the standard quantum limit in advanced gravitational-wave detectors. Classical and quantum gravity, 18(15): GRP/00/549, pp. L95-L101. doi:10.1088/0264-9381/18/15/102.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0019-84CE-4
Zusammenfassung
The uncertainty principle, applied naively to the test masses of a laser-interferometer gravitational-wave detector, produces a Standard Quantum Limit (SQL) on the interferometer's sensitivity. It has long been thought that beating this SQL would require a radical redesign of interferometers. However, we show that LIGO-II interferometers, currently planned for 2006, can beat the SQL by as much as a factor two over a bandwidth \Delta f \sim f, if their thermal noise can be pushed low enough. This is due to dynamical correlations between photon shot noise and radiation-pressure noise, produced by the LIGO-II signal-recycling mirror.