Enhanced standoff sensing resolution using quantum illumination

Saikat Guha, Jeffrey H. Shapiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Loss and noise quickly destroy quantum entanglement. Nevertheless, recent work has shown that a quadrature-entangled light source can reap a substantial performance advantage over all classical-state sources of the same average transmitter power in scenarios whose loss and noise makes them entanglement breaking [1, 2, 3, 4, 5, 6], standoff target-detection being an example. In this paper, we make a first step in extending this quantum illumination paradigm to the optical imaging domain, viz., to obtain better spatial resolution for standoff optical sensing. Our canonical imaging scenario - restricted, for simplicity, to one transverse dimension - is taken to be that of resolving one versus two closely-spaced in-phase specular point targets. We show that an entangled-state transmitter, which uses continuous-wave-pumped spontaneous parametric downconversion (SPDC), achieves an error-probability exponent that exceeds that of all classical-state transmitters of the same average power. Using these error-exponent results, we find the ultimate spatial-resolution limits for coherent-state and SPDC imaging systems that use their respective quantum-optimal receivers, thus quantifying the latter's spatial-resolution advantage over the former. We also propose a structured optical receiver that is ideally capable of harnessing 3 dB (of the full 6 dB) gain in the error-probability exponent achievable by the SPDC transmitter and its quantum-optimal receiver.

Original languageEnglish (US)
Title of host publicationQuantum Communication, Measurement and Computing, QCMC 2010 - The Tenth International Conference
Pages113-116
Number of pages4
DOIs
StatePublished - Nov 16 2011
Externally publishedYes
Event10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010 - Brisbane, QLD, Australia
Duration: Jul 19 2010Jul 23 2010

Publication series

NameAIP Conference Proceedings
Volume1363
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010
CountryAustralia
CityBrisbane, QLD
Period7/19/107/23/10

Keywords

  • Entanglement
  • quantum imaging
  • spontaneous parametric downconversion

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Guha, S., & Shapiro, J. H. (2011). Enhanced standoff sensing resolution using quantum illumination. In Quantum Communication, Measurement and Computing, QCMC 2010 - The Tenth International Conference (pp. 113-116). (AIP Conference Proceedings; Vol. 1363). https://doi.org/10.1063/1.3630159