On Fri, Oct 28, 2022 at 10:17 AM John Clark <johnkcl...@gmail.com> wrote:
> On Thu, Oct 27, 2022 at 6:55 PM Bruce Kellett <bhkellet...@gmail.com> > wrote: > > *> You can delay the choice as to whether or not to utilize the >> information about which slit the particle went through until long after >> that particle has hit the screen* >> > > No you cannot, you must perform the quantum erasure after the particle > passes through the slits but before it hits the screen, although that > time can be as long as you want it to be, you just have to increase the > distance between the slits in the screen. > Look. The experiments have been done, and the act of quantum erasure can be delayed until long after the particles have hit the screen and formed the image there. > * > and formed its permanent image on the screen.* >> > > Once a large-scale macro change has been made, such as would happen when > the particle hits the screen, it would be virtually impossible to get all > the trillions of particles in the screen to become identical again and > cause the two universes to merge back together again. > That is why your notion of erasure as making separate universes recombine falls apart. The choice about what measurement to make can be delayed until long after the pattern is formed on the screen. This is the point of Wheeler's delayed choice idea. If you cannot conceive of how this could possibly be right, then I suggest you overcome your prejudices and look at the account by Sabine Hossenfelder. Or even go so far as to look at the Wikipedia page on quantum erasure. These sources spell out in detail how you can form both interference and non-interference patterns that are resolved only long after the patterns are formed. Bruce -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLQxeAQ2wNtbPbnSeW3c4-aS1bwiCs8UMNpc5rzNBbXwDw%40mail.gmail.com.
