Optimal squeezing for quantum target detection

Research output: Contribution to journalArticlepeer-review


It is not clear if the performance of a quantum lidar or radar, without an idler and only using Gaussian resources, could exceed the performance of a semiclassical setup based on coherent states and homodyne detection. Here we prove this is indeed the case by showing that an idler-free squeezed-based setup can beat this semiclassical benchmark. More generally, we show that probes whose displacement and squeezing are jointly optimized can strictly outperform coherent states with the same mean number of input photons for both the problems of quantum illumination and reading.
Original languageEnglish
Article numberL042039
JournalPhysical Review Research
Publication statusPublished - 10 Dec 2021

Bibliographical note

© 2021. American Physical Society.

Revised version


  • quant-ph
  • physics.optics

Cite this