Quantum expander for gravitational-wave observatories

Mikhail Korobko; Yiqiu Ma; Yanbei Chen; Roman Schnabel

doi:10.1038/s41377-019-0230-2

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Quantum expander for gravitational-wave observatories

Article

- Quantum expander for gravitational-wave observatories
- Light: Science & Applications Vol. 8, Issue 6, Pages: 1152-1159(2019)
- Affiliations：
  
  1.Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
  2.Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, CA 91125, USA
- Author bio：
  
  Mikhail Korobko (mkorobko@physnet.uni-hamburg.de)
- Funds：
- DOI：10.1038/s41377-019-0230-2
  CLC：
- Published：2019，
  
  Published Online：11 December 2019，
  
  Received：15 April 2019，
  
  Revised：13 November 2019，
  
  Accepted：28 November 2019
- Accepted：
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Korobko, K. et al. Quantum expander for gravitational-wave observatories. Light: Science & Applications, 8, 1152-1159 (2019).
DOI：

Korobko, K. et al. Quantum expander for gravitational-wave observatories. Light: Science & Applications, 8, 1152-1159 (2019). DOI： 10.1038/s41377-019-0230-2.

摘要

Abstract

The quantum uncertainty of laser light limits the sensitivity of gravitational-wave observatories. Over the past 30 years

techniques for squeezing the quantum uncertainty

as well as for enhancing gravitational-wave signals with optical resonators have been invented. Resonators

however

have finite linewidths

and the high signal frequencies that are produced during the highly scientifically interesting ring-down of astrophysical compact-binary mergers still cannot be resolved. Here

we propose a purely optical approach for expanding the detection bandwidth. It uses quantum uncertainty squeezing inside one of the optical resonators

compensating for the finite resonators' linewidths while keeping the low-frequency sensitivity unchanged. This quantum expander is intended to enhance the sensitivity of future gravitational-wave detectors

and we suggest the use of this new tool in other cavity-enhanced metrological experiments.

关键词

Keywords

references

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