Regarding my bafflement at quantum radar a reader writes:
My understanding of quantum entanglement would seem to say that such a thing is theoretically possible — although I question just how much quantum-level information gets changed by bouncing photons off a target. I’d guess it was a more macroscopic level of information in a radar signal. But assume that much works. The real next problem is how does one generate a few billion entangled photons, and separate them into the 2 described streams? My understanding is that it’s difficult to create and isolate quantum entangled (maybe we should just start calling them QE particles?) particles.
It occurs to me that one of the strategies of stealth aircraft is to absorb and even transmit the absorbed EM radiation out the other side, much like the conceptual “invisibility cloak,” and I wonder if that action of absorption would actually disturb the entangled photons as to dissolve the entanglement. Identify those disentangled photons and you have a picture?
I dunno, just guessing here.
