Quantum variational measurement in the next generation gravitational-wave detectors

Abstract

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).

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

References in corpus (1)

• Coherent control of vacuum squeezing in the Gravitational-Wave Detection Band

Cited by in corpus (2)

• Quantum state preparation and macroscopic entanglement in gravitational-wave detectors
• Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input