Demonstration of quantum-enhanced rangefinding robust against classical jamming

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We demonstrate a quantum-enhanced lidar capable of performing confident target detection and rangefinding in the presence of strong, time-varying classical noise whilst operating with over five orders of magnitude separation between signal and background levels and target reflectivities down to -52 dB. We use a log-likelihood-based framework to introduce a new protocol for dynamic background tracking, verifying resilience of our system to both fast- and slow-modulation jamming in regimes where a classical illumination-based system fails to find a target. These results demonstrate the advantage of exploiting quantum correlations for lidar applications, providing a clear route to implementation in real-world scenarios.
Original languageEnglish
Pages (from-to)2916-2928
Number of pages13
JournalOptics Express
Issue number3
Publication statusPublished - 16 Jan 2024


  • quantum-enhanced rangefinding
  • optical lidar
  • target detection


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