Quantum and non-local effects offer over 40 dB noise resilience advantage towards quantum lidar

Phillip S. Blakey (), Han Liu, Georgios Papangelakis, Yutian Zhang, Zacharie M. Léger, Meng Lon Iu and Amr S. Helmy
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Phillip S. Blakey: University of Toronto
Han Liu: University of Toronto
Georgios Papangelakis: University of Toronto
Yutian Zhang: University of Toronto
Zacharie M. Léger: University of Toronto
Meng Lon Iu: University of Toronto
Amr S. Helmy: University of Toronto

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Non-local effects have the potential to radically move forward quantum enhanced imaging to provide an advantage over classical imaging not only in laboratory environments but practical implementation. In this work, we demonstrate a 43dB higher signal-to-noise ratio (SNR) using a quantum enhanced LiDAR based on time-frequency entanglement compared with a classical phase-insensitive quantum imaging system. Our system can tolerate more than 3 orders of magnitude higher noise than classical single-photon counting quantum imaging systems before detector saturation with a detector dead time of 25ns. To achieve these advantages, we use non-local cancellation of dispersion to take advantage of the strong temporal correlations in photon pairs in spite of the orders of magnitude larger detector temporal uncertainty. We go on to incorporate this scheme with purpose-built scanning collection optics to image non-reflecting targets in an environment with noise.

Date: 2022
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DOI: 10.1038/s41467-022-33376-9

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