On Tue, Jun 29, 2021 at 8:16 AM 'Brent Meeker' via Everything List < [email protected]> wrote:
> On 6/28/2021 9:27 AM, John Clark wrote: > > On Mon, Jun 28, 2021 at 11:13 AM Jason Resch <[email protected]> wrote: > > >>And there is no reason to suppose that such worlds exist. >>> >> >> *> There is: how do quantum computers work unless the wave function, and >> all its superpositional states, are "really real"?* >> > > Forget Quantum Computers, I can't even understand how the 2 slit > experiment could work as it does if those other Everett worlds didn't > exist. > > > The photons can't go thru slits in different worlds and still interfere is > this one. > I think John's trouble here is that he still adheres to David Deutsch's concept of worlds. Deutch talks as though every component of a superposition is a separate world. This leaves Deutsch no language to talk about decohered worlds, pointer states, and all the other usual apparatus of quantum interpretations. The trouble with taking every component of a superposition as a separate world is that in Hilbert space (as in any vector space) you can define an infinite number of different sets of basis vectors, so any vector in the space is represented by an infinity of different worlds, and there is no way to distinguish between these. I think Bruno has flirted with this idea as well. Deutsch, through his popular writings, has done an immense amount of harm to the cause of quantum interpretations. 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/CAFxXSLTkvcdpGWAyfLtVLh0%3DsyRNYwJGk6zAjH7jYR-3%2BAhghw%40mail.gmail.com.
