Teleportation-based speed meter for precision measurement
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1.
University of Tokyo
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2.
National Astronomical Observatory of Japan
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3.
Australian National University
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4.
California Institute of Technology
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5.
Institute of Science Tokyo
Abstract
We propose a quantum teleportation-based speed meter for interferometric displacement sensing. The primary motivation is to transform a conventional position-sensing interferometer into a quantum non-demolition speed measurement device, without modifying its fundamental optical configuration. Two equivalent implementations are presented: an online approach that uses real-time displacement operation and an offline approach that relies on post-processing. Both implementations reduce quantum radiation pressure noise and surpass the standard quantum limit of measuring displacement, and they can be applied to a wide range of interferometer configurations. We discuss potential applications to gravitational-wave detectors, where our scheme enhances low-frequency sensitivity without requiring modifications to the core optics of a conventional Michelson interferometer (e.g., substrate or coating properties). This approach offers a new path to back-action evasion enabled by quantum entanglement.
Copyright and License
© The Author(s) 2025. This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.
Acknowledgement
Authors acknowledge the LIGO Quantum-Noise Working group, Mikhail Korobko, and Haixing Miao for commenting on the manuscript. Research by Y. N. is supported by JSPS Grant-in-Aid for JSPS Fellows Grant Number 23KJ0787 and 23K25901. J.W.G. is supported by the Australian Research Council Center of Excellence for Gravitational Wave Discovery (Project No. CE170100004 and CE230100016), an Australian Government Research Training Program Scholarship, and also partially by the US NSF grant PHY-2011968. In addition, Y.C. acknowledges the support of the Simons Foundation (Award Number 568762). This work was partially supported by JST ASPIRE (JPMJAP2320).
Data Availability
No datasets were generated or analyzed during the current study.
Supplemental Material
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Additional details
Related works
- Describes
- Journal Article: https://rdcu.be/eM8FZ (ReadCube)
- Is new version of
- Discussion Paper: arXiv:2504.18111 (arXiv)
Funding
- Japan Society for the Promotion of Science
- 23KJ0787
- Japan Society for the Promotion of Science
- 23K25901
- Australian Research Council
- CE170100004
- Australian Research Council
- CE230100016
- Australian Government
- National Science Foundation
- PHY-2011968
- Simons Foundation
- 568762
- Japan Science and Technology Agency
- JPMJAP2320
Dates
- Accepted
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2025-09-04