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 everything-list+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/everything-list/d384b091-58cb-42c8-b107-3ee49d8d3fcfn%40googlegroups.com.
