3 ms·

For as far as I can tell, the solution is that whenever there is a choice to be made, all choices are made and you get separate branches/parallell universe bubb

For as far as I can tell, the solution is that whenever there is a choice to be made, all choices are made and you get separate branches/parallell universe bubbles that expand at the speed of light, interacting (or not) with other universe bubbles. The bubble in which entangled electron A had spin up interacts with the other in which electron B had spin down and vice versa. So essentially you have an ever growing set of merging and splitting history branches, always growing for every point in space, continously. I've got no idea how to make that work for your example of polarizers, or for the example of delayed quantum eraser experiments, etc... The surface of the bubbles apparantly have to carry all of that information and there must be some mechanism for them to decide which ones interact with which others.

JulianMorrison 11y ago
They aren't exactly bubbles expanding at the speed of light (necessarily). They are more like: when you get a particle interaction whose outcome is determined by a fact which has more than one answer, you get more than one outcome. And that applies recursively as those particles whizz off and interact with anything else. It's possible though unlikely that they could be expanding no faster than the speed of a walking scientist - if nothing else in the universe is yet causally determined by the outcome.