Easing the experimental requirements of quantum illumination

Roberto Di Candia*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Abstract

Quantum illumination is one of the main paradigms for implementing quantum radar in the low-frequency spectrum. Here, we discuss how to ease the open-air application of the protocol. I first define an experimentally feasible receiver for an entangled signal-idler transmitter. This consists of measuring heterodyne the received signal and adaptively measuring homodyne the idler, reaching a maximal quantum advantage of 3 dB in the error probability exponent with respect to the optimal classical strategy. Our receiver requires only a single tunable JPA. To relax the bandwidth requirement at the transmitter level, we discuss a sequential protocol that uses patches of modes sequentially to probe the target region. We show that, in a practical scenario, the sequential protocol needs two orders of magnitude less bandwidth with respect to the non-sequential protocol, while keeping the same quantum advantage. We finally briefly discuss possible applications of quantum illumination for backscatter communication and covert communication.

Original languageEnglish
Title of host publicationQuantum Technologies for Defence and Security
EditorsGiacomo Sorelli, Sara Ducci, Sylvain Schwartz
PublisherSPIE
Number of pages5
ISBN (Electronic)9781510681125
DOIs
Publication statusPublished - 2024
MoE publication typeA4 Conference publication
EventQuantum Technologies for Defence and Security - Edinburgh, United Kingdom
Duration: 17 Sept 202419 Sept 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume13202
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Technologies for Defence and Security
Country/TerritoryUnited Kingdom
CityEdinburgh
Period17/09/202419/09/2024

Keywords

  • backscatter communication
  • covert communication
  • quantum illumination
  • quantum metrology
  • quantum parameter estimation
  • quantum radar
  • Remote quantum sensing

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