On Fri, Oct 28, 2022 at 9:02 AM John Clark <[email protected]> wrote:
> Then after the electron passes through the slits but before it hits the > photographic plate the witch-way information is erased. So when the > photographic plate is developed and if you see interference bands then you > know there must be other worlds than this one, and if you don't see > interference bands then the Many Worlds idea is bullshit. > > Decoherence usually spreads with enormous speed but if things are > arranged very carefully, if only one electron in the universe got > decohered, then it's possible the electron could become re-cohered > because in the Many Worlds theory it makes no sense to talk about two > identical universes, so if the witch-way information of that electron has > been erased then there's no longer any difference between the two universes > and they merge back together. > This idea that quantum erasure allows two universes to recombine to produce the interference pattern (which you have got from the early writings of David Deutsch, I know) is complete nonsense. It is completely demolished by the delayed choice experiments. 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 and formed its permanent image on the screen. It cannot decide whether or not to interfere with itself to produce an interference pattern at that time -- the decision about where to hit the screen has long since been made. So there can be no "merging of two separate worlds" at that point. I cannot recommend strongly enough that you read and study the article by Carroll -- it might rid you of a number of misconceptions that you have built up over time: https://www.preposterousuniverse.com/blog/?s=quantum+erase 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLQ%2BSWq_gARzmrFEaZKz77tat-2j%3DP8p6jAX607aXN4QUQ%40mail.gmail.com.
