On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: > > Obviously you can't measure the particle simultaneously in the up and down > state. Nobody believes that.

Bruno does. Nobody is arguing it. Bruno argues it. Honestly it's hard to understand why you have such an agitated bee in your > bonnet about superpositions. I don't like misleading ideas. The mathematical expression of the photon polarised at 45 degrees to the > measurement apparatus is a normalised vector spanning the space of both up > and down. I guess what you interpret that to mean is up to you since the > mathematical predictions that arise from it are the same: 50% chance of up > or down. Once again, you're simply arguing at cross purposes with Bruno, > who clearly understands QM perfectly well. Not in my opinion. He thinks that an Up or Dn measurement is the same as measuring Up + Dn or Up - Dn because the wf can be written that way in some basis. He's not saying the photon can be measured as up and down at the same time. > He's just saying that any superposition of up and down is an eigenvector in > some other orientation of the apparatus. It's not. My last post proved this with utmost clarity. Up + Dn or Up - Dn is never an eigenfunction regardless of the orientation of the apparatus. How could it be if measuring Up and Dn separately exhausts the total probability of unity? I think you need to rethink this issue. -- 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.