Can retrocausality solve the puzzle of action at a distance?
What confuses me about these experiments is that, per special relativity, from the point of view of the photon the moment of it&#x27;s emission and detection are the same. It&#x27;s traveling at the speed of light, so no time passes between those events. So talking about it&#x27;s state at this or that time is not talking about it&#x27;s intrinsic state, only our external view of it from our frame of reference. But in terms of a description of the photon in it&#x27;s frame of reference, that&#x27;s meaningless.<p>EDIT: Or is this what the Paris Zigzag does - treat the state of the photon and it&#x27;s twin as a single state, regardless of our time-based view of it, incorporating the moment of detection, emission and detection of the entangled twin within the same description?