Quantum Illumination with a Hetero-Homodyne Receiver and Sequential Detection

Maximilian Reichert, Quntao Zhuang, Jeffrey H. Shapiro, Roberto Di Candia

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
31 Downloads (Pure)


We propose a hetero-homodyne receiver for quantum illumination (QI) target detection. Unlike prior QI receivers, it uses a cascaded positive operator-valued measurement (POVM) that does not require a quantum interaction between QI's returned radiation and its stored idler. When used without sequential detection its performance matches the 3-dB quantum advantage over optimum classical illumination (CI) that Guha and Erkmen's [Phys. Rev. A 80, 052310 (2009)] phase-conjugate and parametric amplifier receivers enjoy. When used in a sequential detection QI protocol, the hetero-homodyne receiver offers a 9-dB quantum advantage over a conventional CI radar, and a 3-dB advantage over a CI radar with sequential detection. Our work is a significant step forward toward a practical quantum radar for the microwave region, and, more generally, emphasizes the potential offered by cascaded POVMs for quantum radar.

Original languageEnglish
Article number014030
Number of pages12
JournalPhysical Review Applied
Issue number1
Publication statusPublished - 14 Jul 2023
MoE publication typeA1 Journal article-refereed


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