Teleportation-based Speed Meter for Precision Measurement

• URL: http://arxiv.org/abs/2504.18111v1
• Date: Fri, 25 Apr 2025 06:29:24 GMT
• Title: Teleportation-based Speed Meter for Precision Measurement
• Authors: Yohei Nishino, James W. Gardner, Yanbei Chen, Kentaro Somiya,
• Abstract summary: We propose a quantum teleportation-based speed meter for interferometric displacement sensing.<n>Two equivalent implementations are presented that reduce quantum radiation pressure noise and surpass the standard quantum limit of measuring displacement.<n>This approach offers a new path to back-action evasion enabled by quantum entanglement.
• Score: 11.118338267742097
• License: http://creativecommons.org/licenses/by/4.0/
• 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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