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

Danilishin, S. L., Knyazev, E., Voronchev, N. V., Khalili, F. Y., Gräf, C., Steinlechner, S., et al. (2018). A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holesa. Light: Science & Applications, 7: 11. doi:10.1038/s41377-018-0004-2.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-AA23-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E995-F
Genre: Journal Article

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 Creators:
Danilishin, Stefan L., Author
Knyazev, Eugene, Author
Voronchev, Nikita V., Author
Khalili, Farid Ya., Author
Gräf, Christian1, Author              
Steinlechner, Sebastian1, Author              
Hennig, Jan-Simon, Author
Hild, Stefan1, Author              
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Quantum Physics, quant-ph
 Abstract: The recent discovery of gravitational waves (GW) by LIGO has impressively launched the novel field of gravitational astronomy and it allowed us to glimpse at exciting objects we could so far only speculate about. Further sensitivity improvements at the low frequency end of the detection band of future GW observatories rely on quantum non-demolition (QND) methods to suppress fundamental quantum fluctuations of the light fields used to readout the GW signal. Here we invent a novel concept of how to turn a conventional Michelson interferometer into a QND speed meter interferometer with coherently suppressed quantum back-action noise by using two orthogonal polarisations 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 and find that the configuration proposed here would significantly enhance the low frequency sensitivity and increase the observable event rate of binary black hole coalescences in the range of $10^2-10^3 M_\odot$ by a factor of 100.

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 Dates: 2017-02-032018
 Publication Status: Published in print
 Pages: 7 pages, 4 figures
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 Rev. Method: -
 Identifiers: arXiv: 1702.01029
URI: http://arxiv.org/abs/1702.01029
DOI: 10.1038/s41377-018-0004-2
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Title: Light: Science & Applications
Source Genre: Journal
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Pages: - Volume / Issue: 7 Sequence Number: 11 Start / End Page: - Identifier: -