On Tue, Jul 31, 2018 at 1:15 AM Brent Meeker <[email protected]> wrote:
> > > On 7/30/2018 9:27 PM, Jason Resch wrote: > > > > On Mon, Jul 30, 2018 at 11:21 PM Bruce Kellett <[email protected]> > wrote: > >> From: Jason Resch <[email protected]> >> >> On Mon, Jul 30, 2018 at 8:33 PM Bruce Kellett <[email protected]> >> wrote: >> >>> From: Jason Resch <[email protected]> >>> >>> >>> You can use "itself" only if this "it" can be in multiple locations and >>> heading in different directions. >>> >>> >>> That is a property of waves. But you will only ever observe a single >>> photon from this wave..... >>> >> >> Waves/Photons, doesn't matter what you call them. >> >> Within the quantum computer this wave/photon is simultaneously in many >> different locations/doing many different things, performing computations >> and doing useful work using all of its separate superposed instances of >> itself. Once it's done doing all this work it settles down on a final >> value which we can read. And it will be correct, and may have finished an >> enormous computation in a short period of time, if and only if, it did in >> fact split up and do all these independent things simultaneously. >> >> >> Or you can view the action of a quantum computer as a simple interference >> effect. Incorrect solutions to the algorithm destructively interfere. You >> don't have to introduce ideas such as 'being in different locations and >> doing different things.' It is just simple interference in a wave. (And it >> is all in one world, because interference can only occur within the one >> world.) >> >> >> > To add some clarity, I would say interference effects of a superposed > system can only be seen from the vantage point of another system which has > not interacted with that superposed/interfering system. > > > I don't know what "seen from a vantage point" means, but you can't see > anything without interacting with it. > > > > >> >> On that we agree. But where did those other photons come from? How did >>> they get to be in different positions going in different directions? >>> >>> >>> They aren't. >>> >> >> How do do you explain the experiment with beam splitters and recombining >> light at a half silvered mirror to interfere and only be reflected one way? >> >> >> Photons have both wave-like and particle-like properties. That is quantum >> physics. >> >> So do you accept or reject that this "wave" can be in different places >> simultaneously? >> >> >> A wave is not a localized object, so the same wave can extend to >> different locations. >> > > So then "a photon is not a localized object, so the same photon can extend > to different locations." -- is this right or wrong? > > > Right. But it's localized in in the same world if it interferes with > itself; and of course it is never spacelike separate from itself. > I don't understand that last part "it is never spacelike separate from itself", isn't that what beam splitters do, cause spacelike separations of a photon? Jason -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
