https://en.wikipedia.org/wiki/Quantum_radar
Seems interesting. Looks like they use quantum entanglement of photons and convert half of the entangled pairs from optical to microwaves that get emitted from the source and then do a conversion back from the received signal to photons. The received signal photons can then be checked for entanglement with the stored signal photons. Any entangled pairs found would then indicate a true reflection and the gain and noise resistance of the system would be much higher over a traditional system. I question if the chinese were able to solve the technical problems of storing the halves of the original signal pairs in quantum memory for the duration of the trip from emission to reflection. Probably depends on how much effort and resources they put into development vs how much effort and resource was spent by the US. I'm kind of convinced at this point that the US can barely commit to projects like these because of hubris, politics and shitty management decisions. They get some jew up there with a lot of credentials to just say it's impossible from a cursory look and give up.
Low and behold physicist Jeffrey Shapiro
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