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Experimental Distributed Quantum Sensing in a Noisy Environment.

J Bate1, A Hamann2, M Canteri1

  • 1Universität Innsbruck, Institut für Experimentalphysik, Technikerstraße 25, 6020 Innsbruck, Austria.

Physical Review Letters
|December 12, 2025
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This summary is machine-generated.

Quantum sensors offer precision but are vulnerable to noise. This study demonstrates a quantum sensing protocol using trapped ions that isolates signals from noise, significantly outperforming classical methods and applicable to quantum sensor networks.

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Area of Science:

  • Quantum sensing
  • Quantum information science
  • Experimental physics

Background:

  • Quantum states in sensors provide precision advantages.
  • Noise can compromise these quantum sensing advantages.
  • Theoretical work suggests noise spatial profiles different from the signal can be exploited.

Purpose of the Study:

  • To experimentally demonstrate a quantum sensing protocol.
  • To show how quantum entanglement can maintain and improve sensing precision in the presence of noise.
  • To compare the quantum protocol's performance against classical strategies.

Main Methods:

  • Utilizing trapped-ion sensors.
  • Creating an entangled state of multidimensional sensors.
  • Implementing a protocol to isolate signals from noise with different spatial profiles.

Main Results:

  • The quantum protocol successfully isolated and detected signals.
  • The protocol demonstrated insensitivity to overwhelming noise fields.
  • The quantum protocol outperformed a perfect classical strategy without entanglement.
  • The demonstration was performed for magnetic and electromagnetic fields over micron distances.

Conclusions:

  • The demonstrated quantum sensing protocol effectively overcomes noise limitations.
  • The technique is scalable to arbitrary distances and fields.
  • This work presents a promising application for quantum sensor networks.