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China Says It Has Developed a Quantum Radar That Can See Stealth Aircraft (digitaltrends.com)
An anonymous reader quotes a report from Digital Trends: At a recent air show in the city of Zhuhai, state-owned Chinese defense giant China Electronics Technology Group Corporation displayed what it claims to be a quantum radar that's able to detect even the stealthiest of stealth aircraft. The company claims to have been working on the technology for years, and to have tested it for the first time in 2015. In principle, a quantum radar functions like a regular radar -- only that instead of sending out a single beam of electromagnetic energy, it uses two split streams of entangled photons. Only one of these beams is sent out, but due to a quirk of quantum physics both streams will display the same changes, despite being potentially miles apart. As a result, by looking at the stream which remains back home it's possible to work out what has happened to the other beam. According to a brochure from the China Electronics Technology Group Corporation, the new quantum radar could "solve the traditional bottleneck [of] detection of low observable target detection, survival under electronic warfare conditions, [and] platform load limitations."
Really, you quantum entangled two particles, sent one miles away and observe the other one to detect a plane. Doesn't observing of the other particle change the state of the entangled particle sent away? Plus there is the whole what if that particle hits anything else on the way, say a rain drop?
Sounds like they have been watching too much Sci-Fi or they just wanted to call it Quantum Radar when its just really an narrow band radar.
What's next, they are working on a Reverse Quantum Phase Radar Interference Detector to detect when their Quantum Radar is jammed? (hopefully it's snozberries jam).
This "Schrodinger's Cat Scan" radar doesn't seem credible to me. Granted, "quantum" contains a lot of weirdness, but this just doesn't convince me.
Disinformation? Maybe.
Cover for some other technology entirely? I think I'd be more likely to believe that.