On Mon, Jul 30, 2018 at 12:29 AM, Bruce Kellett <[email protected]> wrote:
> From: Jason Resch <[email protected]> > > > On Mon, Jul 30, 2018 at 12:13 AM, Brent Meeker <[email protected]> > wrote: > >> ?? Quantum computers cannot calculate anything more than classical >> computers. There are some algorithms that allow a QC to calculate >> something faster; but the domain and range is the same. >> >> So absent that reason does it follow that the wave function is merely a >> convenient (and very accurate) tool? >> >> > Tool for what? Predicting probabilities of finally measured values? > > What then can we say about the intermediate values and the computation > itself? Does it exist and happen, or does the final result merely > materialize magically like the live or dead cat? > > > Does the spot on the screen behind two slits materialize magically? Or > arise as a consequence of the interference in the one world? > > In many-worlds, all possible screen spots occur in different worlds. But > the separation into distinct worlds happens only on decoherence at the > screen -- the interference all happens in the original single world. > What is the photon in each world interfering with? It's many shadow partners in other worlds. World is a confusing term unless we define it. We might also say the system of the photon is in many states, while the rest of the system (us, the screen) remain in one state, until we interact with the many-state photon system. So in that sense, you could argue the screen and us are in one world until the decoherence. But the system of the photons can't properly be described as any singe photon system. 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.
