Science
In reply to the discussion: Quantum Entanglement, Dark Counts, Coincidence Detection [View all]mindwalker_i
(4,407 posts)in the middle. Yeah, quantum encryption doesn't actually send information, exactly. For Cramer's scheme, however, the entanglement does carry information in terms of the state of superposition of groups of photons. That can also be used to get negative latency in that the decision whether to "read" the momentum of the photons can happen after the state of superposition has already been measured. Demonstrating that is a major goal for Cramer, and now me.
I mentioned experiments that have strongly hinted at this already. Some months ago an experiment was done where two pairs of photons were created. One photon from each pair was measured for polarization, and the other two went on for some distance before an entanglement "swapping" operation could be performed. If the operation was done, the two photons that HAD ALREADY BEEN DETECTED became retroactively entangled, and their polarizations matched. I think this was done by Zellinger. The was some stuff at the end of the article that explained why this wasn't time travel, but it didn't make sense to me - it sounded like Obi Wan: "So what I told you was true, from a certain point of view."
So my feeling is that entanglement and QM take an rather twisted view of time. Entanglement seems to ignore it. Granted, I'm a hard-core SF fan and can't separate that entirely from my opinions. Hence, I have to try it