> > > > > > > > > > > > If two events are space-like separated, I think it's correct > > > to say there is no causal ordering. However, when analyzing time reversal > > > for measurements -- whether or not it exists in QM -- aren't we dealing > > > with time-like ordering in the laboratory wherein the "first" measurement > > > occurred? AG > > > > > > > > > > Frankly I do not think there is a "first" measurement and a > > "second" measurement, in case of entangled space-like separated parties. > > > > > > Right. But isn't there a measurement, and THEN its hypothetical reversal; > that is, the attempt to reconstruct its wf by going backward in time? How > does space-like separated get into the act? AG >
A bit difficult for me. Tentatively, I would say that if temporal ordering between measurements of two (let us say space-like) entangled parties is indefinite, also temporal ordering between hypothetical reversal of measurements of two (let us say space-like) entangled parties is indefinite. I can imagine another option. The equivalence between non-locality (non-separability) and retro-causality. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
