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

Danilishin, S. L., Knyazev, E., Voronchev, N. V., Khalili, F. Y., Gräf, C., Steinlechner, S., Hennig, J.-S. and Hild, S. (2018) A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes. Light: Science and Applications, 7, 11. (doi: 10.1038/s41377-018-0004-2) (PMID:30839613) (PMCID:PMC6107026)

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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 102−103M⊙ by a factor of up to ~300.

Item Type:Articles
Additional Information:S.L.D. was supported by the Lower Saxonian Ministry of Science and Culture within the frame of “Research Line” (Forschungslinie) QUANOMET – Quantum- and Nano-Metrology. The work of E.K. and F.Y.K. was supported by the Russian Foundation for Basic Research Grants 14-02-00399 and 16-52-10069. F.Y.K. was also supported by the LIGO NSF Grant PHY-1305863.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Danilishin, Dr Stefan and Steinlechner, Dr Sebastian and Hennig, Mr Jan-Simon and Graef, Dr Christian and Hild, Professor Stefan
Authors: Danilishin, S. L., Knyazev, E., Voronchev, N. V., Khalili, F. Y., Gräf, C., Steinlechner, S., Hennig, J.-S., and Hild, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Light: Science and Applications
Publisher:Nature Publishing Group
ISSN:2047-7538
ISSN (Online):2047-7538
Published Online:23 February 2018
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Light: Science and Applications 7:11
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
591381SagnacSpeedmeter: Interferometry beyond the Standard Quantum Limit using a Velocity Sensitive Sagnac InterferometerStefan HildEuropean Research Council (ERC)307245P&A - PHYSICS & ASTRONOMY
683761AQUIREStefan HildEuropean Commission (EC)658366S&E P&A - PHYSICS & ASTRONOMY
731731Improving low-frequency sensitivity of the future gravitational-wave detectorsStefan HildThe Royal Society (ROYSOC)IE160125S&E P&A - PHYSICS & ASTRONOMY