On Thursday, 6 February 2025 at 07:42:57 UTC+13 Alan Grayson wrote:
And why the MWI is unverifiable and tantamount to a fantasy. AG I don't know if David Deutsch still considers this a valid response, but it's come a darn sight closer to reality since he suggested it back in the 90s (I think). He claimed that explaining a sufficiently advanced quantum computer requires the MWI. The other day I saw a headline about the latest quantum computer that could - in principle, of course - outperform a classical computer by a factor of many trillions. Unfortunately I can't remember where I saw it, but there was some huge age-of-the-universe-plus claim involved. So, if we assume that a quantum computer can reach the point where it outperforms a classical computer by more than the theoretical limit - something involving the Bekenstein Bound and Margolus-Levitin Limit, apparently, which ChatGPT reliably informs me for a volume V and time t comes down to Max computations∼(c^5/ ℏG) . tV (c, G and h bar having their usual values). So if this is possible, the MWI would become verifiable, in that - to quote Professor Deutsch - where else can the computations be performed, except in branches of a multiverse? Anyway, I don't suppose this will actually be demonstrated anytime soon, but it is one theoretical test of the MWI, hence it's - very much in principle - verifiable. -- 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 visit https://groups.google.com/d/msgid/everything-list/d384b091-58cb-42c8-b107-3ee49d8d3fcfn%40googlegroups.com.
