On Sat, Apr 28, 2018 at 8:16 PM, Bruce Kellett <[email protected]> wrote:
>> >> >> Although the other universe is only slightly different from ours and only >> exists for a short time before it merges back into ours I think we do have >> access to another universe every time we perform the 2 slit experiment. > > > > >* * > *Not once you take account of decoherence. You are equivocating on the > meaning of "world". Separate "worlds" only emerge after decoherence.* > Separate worlds only emerge if there is a difference between them, if the worlds evolve in such a way that the difference disappears then re-coherence occurs. A photon goes through slot X in one world and slot Y in another and that is a difference. When the photon hits the photographic plate, or even just a brick wall, the photon no longer exists in either world so there is no longer a difference, but there once was and those incompatible histories cause the interference bands. If you had no photographic plate or brick wall and just let the photons go onto infinite space after passing the slits the 2 worlds would remain separate forever. For obvious reasons re-coherence can only occur if the 2 worlds are only very slightly different and have only been separated for a short time, and that is why experiment of this sort are difficult but they are not impossible. > > ** > *Your "relative state" does not permit access to other "worlds".* > The truth or falsehood o f that statement can only be determined by experiment, and I think most on this list will live long enough to see the answer. John K Clark -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
