Quantum variational measurement in the next generation gravitational-wave detectors

Details Quantum variational measurement in the next generation gravitational-wave detectors Quantum variational measurement in the next generation gravitational-wave detectors

2006-09-15

arxiv.org/abs/gr-qc/0609058v2

Phys.Rev.D76:102002,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 4 figures; NSNS SNR estimates added; misprints corrected

Scientific paper

10.1103/PhysRevD.76.102002

A relatively simple method of overcoming the Standard Quantum Limit in the next-generation Advanced LIGO gravitational wave detector is considered. It is based on the quantum variational measurement with a single short (a few tens of meters) filter cavity. Estimates show that this method allows to reduce the radiation pressure noise at low frequencies ($<100 \mathrm{Hz}$) to the level comparable with or smaller than the low-frequency noises of non-quantum origin (mirrors suspension noise, mirrors internal thermal noise, and gravity gradients fluctuations).

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