Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.080503
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Funding
- Alexander von Humboldt foundation
- European Commission (ITN-Marie Curie Project cQOM) [290161]
- European Commission (FET-Open Project iQUOEMS) [323924]
- U.S. Office ofNaval Research [N00014-14-C-0002]
- AFOSR
- ONR
- Leverhulme Trust research fellowship
- EPSRC via qDATA [EP/L011298/1]
- EPSRC via HIPERCOM [EP/J00796X/1]
- Engineering and Physical Sciences Research Council [EP/J00796X/1, EP/L011298/1] Funding Source: researchfish
- EPSRC [EP/J00796X/1, EP/L011298/1] Funding Source: UKRI
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Quantum illumination is a quantum-optical sensing technique in which an entangled source is exploited to improve the detection of a low-reflectivity object that is immersed in a bright thermal background. Here, we describe and analyze a system for applying this technique at microwave frequencies, a more appropriate spectral region for target detection than the optical, due to the naturally occurring bright thermal background in the microwave regime. We use an electro-optomechanical converter to entangle microwave signal and optical idler fields, with the former being sent to probe the target region and the latter being retained at the source. The microwave radiation collected from the target region is then phase conjugated and upconverted into an optical field that is combined with the retained idler in a joint-detection quantum measurement. The error probability of this microwave quantum-illumination system, or quantum radar, is shown to be superior to that of any classical microwave radar of equal transmitted energy.
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