Sub-SQL Sensitivity via Optical Rigidity in Advanced LIGO Interferometer with Optical Losses

Details Sub-SQL Sensitivity via Optical Rigidity in Advanced LIGO Interferometer with Optical Losses Sub-SQL Sensitivity via Optical Rigidity in Advanced LIGO Interferometer with Optical Losses

2005-11-02

arxiv.org/abs/gr-qc/0511008v1

Phys.Rev. D73 (2006) 062002

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 9 figures

Scientific paper

10.1103/PhysRevD.73.062002

The ``optical springs'' regime of the signal-recycled configuration of laser interferometric gravitational-wave detectors is analyzed taking in account optical losses in the interferometer arm cavities. This regime allows to obtain sensitivity better than the Standard Quantum Limits both for a free test mass and for a conventional harmonic oscillator. The optical losses restrict the gain in sensitivity and achievable signal-to-noise ratio. Nevertheless, for parameters values planned for the Advanced LIGO gravitational-wave detector, this restriction is insignificant.

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