Hmmm .. thanks for that, Rob.
Very interesting. I never knew that about holograms.
I'm still trying to digest Bell's experiment/theory so I'm not really able to comment, just yet.
My mind just keeps coming back to: "Where is the connection to make this entanglement thing work ? What is it ?"
I think you're suggesting information encoded at the cosmic horizon (?)
What ever it is, it seems pretty clear that there's something very fundamental, which we just can't figure out yet, which makes all this happen.
The holographic principle and quantum mechanics are related through string theory, but all of this is created by human ingenuity. Somehow, the relationship between spins on separated, entangled photons would seem to me, to be caused by something other than human ingenuity.
But then again, until they close that final loophole, perhaps that IS the missing link !!??
Incredible stuff !!
(Lots more reading to do on this ….. not Mathis or Gaede, though

)
Cheers