  Non-local effects have the potential to radically move forward quantum
enhanced LiDAR to provide an advantage over classical LiDAR not only in
laboratory environments but practical implementation. In this work, we
demonstrate a 43dB lower signal-to-noise ratio using a quantum enhanced LiDAR
based on time-frequency entanglement compared with a classical
phase-insensitive LiDAR system. Our system can tolerate more than 3 orders of
magnitude higher noise than classical singlephoton counting LiDAR systems
before detector saturation. 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.
