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arXiv · 2504.18111

Teleportation-based Speed Meter for Precision Measurement

Yohei Nishino·James W. Gardner·Yanbei Chen·Kentaro Somiya
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Abstract

We propose a quantum teleportation-based speed meter for interferometric displacement sensing. 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. 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.

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Yohei Nishino, James W. Gardner, Yanbei Chen, Kentaro Somiya. 2025-04-25. Teleportation-based Speed Meter for Precision Measurement. https://arxiv.org/abs/2504.18111

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