A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes

A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black... The recent discovery of gravitational waves (GW) by Advanced LIGO (Laser Interferometric Gravitational-wave Observatory) has impressively launched the novel field of gravitational astronomy and allowed us to glimpse exciting objects about which we could previously only speculate. Further sensitivity improvements at the low-frequency end of the detection band of future GW observatories must rely on quantum non-demolition (QND) methods to suppress fundamental quantum fluctuations of the light fields used to readout the GW signal. Here we present a novel concept of how to turn a conventional Michelson interferometer into a QND speed-meter interferometer with coherently suppressed quantum back-action noise. We use two orthogonal polarizations of light and an optical circulator to couple them. We carry out a detailed analysis of how imperfections and optical loss influence the achievable sensitivity. We find that the proposed configuration significantly enhances the low-frequency sensitivity and increases the observable event rate of binary black-hole coalescences in the range of $$10^2 - 10^3\,M_ \odot$$ 1 0 2 - 1 0 3 M ⊙ by a factor of up to ~300. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Light: Science & Applications Springer Journals

A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes

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Publisher
Springer Journals
Copyright
Copyright © 2018 by The Author(s)
Subject
Physics; Physics, general; Applied and Technical Physics; Atomic, Molecular, Optical and Plasma Physics; Classical and Continuum Physics; Optics, Lasers, Photonics, Optical Devices
eISSN
2047-7538
D.O.I.
10.1038/s41377-018-0004-2
Publisher site
See Article on Publisher Site

Abstract

The recent discovery of gravitational waves (GW) by Advanced LIGO (Laser Interferometric Gravitational-wave Observatory) has impressively launched the novel field of gravitational astronomy and allowed us to glimpse exciting objects about which we could previously only speculate. Further sensitivity improvements at the low-frequency end of the detection band of future GW observatories must rely on quantum non-demolition (QND) methods to suppress fundamental quantum fluctuations of the light fields used to readout the GW signal. Here we present a novel concept of how to turn a conventional Michelson interferometer into a QND speed-meter interferometer with coherently suppressed quantum back-action noise. We use two orthogonal polarizations of light and an optical circulator to couple them. We carry out a detailed analysis of how imperfections and optical loss influence the achievable sensitivity. We find that the proposed configuration significantly enhances the low-frequency sensitivity and increases the observable event rate of binary black-hole coalescences in the range of $$10^2 - 10^3\,M_ \odot$$ 1 0 2 - 1 0 3 M ⊙ by a factor of up to ~300.

Journal

Light: Science & ApplicationsSpringer Journals

Published: May 30, 2018

References

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