IEEE Aerospace and Electronic Systems Magazine - November 2020 - 68

Progress Toward an All-Microwave Quantum Illumination Radar
successful transmission of entangled microwaves over
relatively short distances in the atmosphere using
already available technology.

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CONCLUSION

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QI is a very promising sensing protocol with significant
potential gains over traditional detection methods in low-signal, high-noise situations. A microwave QI radar could be
built using current superconducting circuit technology using
the quantum-enhanced noise radar protocol. While the transmission of entangled microwave signals remains a significant
technological challenge, the recent proof-of-concept experiments in the microwave domain showing a quantum advantage over classical protocols constitute a very promising first
step. How we go from the proof-of-principle demonstration
to a practical setup showing quantum advantage is still
unclear and could require a significant amount of resources
in the long term. However, the payoff for a successful demonstration of a quantum enhancement in detection would be
immense and warrants further investigation.

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ACKNOWLEDGMENTS

[9] A. A. Clerk, M. H. Devoret, S. M. Girvin, F. Marquardt,

This work was supported by the Defense Research
Development Canada. The work of J. Bourassa was
supported in part by the Institut Trans-disciplinaire en
Information Quantique and in part by the Canada First
Research Excellence Fund. The work of C. M. Wilson
was supported in part by the NSERC of Canada, in
part by the Canadian Foundation for Innovation, in
part by the Ontario Ministry of Research, Innovation
and Science, in part by the CFREF, and in part by the
Industry Canada.
The authors would like to thank A. Choquette-Poitevin
for reviewing this article and useful comments.

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