Quantum expander for gravitational-wave observatories
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.
Additional Information
© 2019 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received 15 April 2019; Revised 13 November 2019; Accepted 28 November 2019. We thank Farid Khalili and Sebastian Steinlechner for valuable comments. M. K. was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SCHN 757/6-1 and the European Research Council (ERC) Project "MassQ" (Grant No. 339897), and supported by the Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy – EXC 2121 "Quantum Universe" – 390833306"; Y. C. and Y. M. are supported by the National Science Foundation through Grants PHY-1708212 and PHY-1708213, the Brinson Foundation, and the Simons Foundation (Award Number 568762). Data availability: The code used to produce the figures is available by request to the corresponding author. Author Contributions: M.K.: conceptualization, formal analysis, methodology, software, visualization, writing; Y.M.: formal analysis, methodology, validation, software, writing (review and editing); Y.C.: supervision, validation, writing (review and editing); R.S.: project administration, supervision, writing (review and editing). The authors declare that they have no conflict of interest.Attached Files
Published - s41377-019-0230-2.pdf
Submitted - 1903.05930.pdf
Supplemental Material - 41377_2019_230_MOESM1_ESM.pdf
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Additional details
- PMCID
- PMC6904558
- Eprint ID
- 100298
- Resolver ID
- CaltechAUTHORS:20191216-104913614
- SCHN 757/6-1
- Deutsche Forschungsgemeinschaft (DFG)
- 339897
- European Research Council (ERC)
- EXC 2121
- Deutsche Forschungsgemeinschaft (DFG)
- 390833306
- Deutsche Forschungsgemeinschaft (DFG)
- PHY-1708212
- NSF
- PHY-1708213
- NSF
- Brinson Foundation
- 568762
- Simons Foundation
- Created
-
2019-12-16Created from EPrint's datestamp field
- Updated
-
2022-02-16Created from EPrint's last_modified field
- Caltech groups
- TAPIR, Astronomy Department, LIGO