can someone who knows about this help ?
OK - I understand quantum entanglement. In fact I understood it before it started getting called quantum entanglement. (It was the EPR paradox when I were a lad). So the result of observing one half of the entangled subsystem is that it then forces the other half into a known state
What I've not got my head around, and never seems to be explained, is how you use this for useful information transmission ? Thing is that the outcome of the first observation is random (quantum acausality). You can't decide what state you're forcing the remote half of the system into - you're stuck with whatever you're given.