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

Stefan L. Danilishin; Eugene Knyazev; Nikita V. Voronchev; Farid Ya. Khalili; Christian Gräf; Sebastian Steinlechner; Jan-Simon Hennig; Stefan Hild

doi:10.1038/s41377-018-0004-2

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

Article

- A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes
- Light: Science & Applications Vol. 7, Issue 4, Pages: 95-103(2018)
- Affiliations：
  
  1.Institut für Theoretische Physik, Leibniz Universität Hannover and Max-PlanckInstitut für Gravitationsphysik (Albert-Einstein-Institut), Callinstraße 38, D-30167 Hannover, Germany
  2.SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
  3.M.V. Lomonosov Moscow State University, Faculty of Physics, Moscow 119991, Russia
  4.Institut für Laserphysik und Zentrum für Optische Quantentechnologien der Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Author bio：
  
  Stefan L. Danilishin (shtefan.danilishin@itp.uni-hannover.de)
- Funds：
- DOI：10.1038/s41377-018-0004-2
  CLC：
- Published：2018，
  
  Published Online：30 May 2018，
  
  Received：27 June 2017，
  
  Revised：12 February 2018，
  
  Accepted：13 February 2018
- Accepted：
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Danilishin, S. L. et al. A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes. Light: Science & Applications, 4, 95-103 (2018).
DOI：

Danilishin, S. L. et al. A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes. Light: Science & Applications, 4, 95-103 (2018). DOI： 10.1038/s41377-018-0004-2.

摘要

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$$

by a factor of up to ~300.

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references

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