Experimental distributed quantum sensing in a noisy environment

• URL: http://arxiv.org/abs/2501.08940v2
• Date: Sun, 02 Nov 2025 14:29:03 GMT
• Title: Experimental distributed quantum sensing in a noisy environment
• Authors: James Bate, Arne Hamann, Marco Canteri, Armin Winkler, Zhe Xian Koong, Victor Krutyanskiy, Wolfgang Dür, Benjamin Peter Lanyon,
• Abstract summary: We experimentally demonstrate the associated sensing protocol, using trapped-ion sensors.<n>An entangled state of multi-dimensional sensors is created that isolates and optimally detects a signal.
• Score: 0.14615254965614236
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The precision advantages offered by harnessing the quantum states of sensors can be readily compromised by noise. However, when the noise has a different spatial function than the signal of interest, recent theoretical work shows how the advantage can be maintained and even significantly improved. In this work we experimentally demonstrate the associated sensing protocol, using trapped-ion sensors. An entangled state of multi-dimensional sensors is created that isolates and optimally detects a signal, whilst being insensitive to otherwise overwhelming noise fields with different spatial profiles over the sensor locations. The quantum protocol is found to outperform a perfect implementation of the best comparable strategy without sensor entanglement. While our demonstration is carried out for magnetic and electromagnetic fields over a few microns, the technique is readily applicable over arbitrary distances and for arbitrary fields, thus present a promising application for emerging quantum sensor networks.

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