On Thursday, April 26, 2018 at 7:12:31 PM UTC, John Clark wrote: > > > On Thu, Apr 26, 2018 at 2:02 PM, <agrays...@gmail.com <javascript:>> > wrote: > > > >> >> * How many times must I remind you that Feynman explained that very >> clearly.* >> > > 42. > > > > >> *Please repeat it. AG* >> > > I originally sent this on December 14 2017: > > David Deutsch proposed a test of Many Worlds about 30 years ago in his > book "The Ghost In The Atom", but it would be very difficult to perform. > The reason it's so difficult to test is not the Many World's theory fault, > the reason is that the conventional view says that conscious observers obey > different laws of physics, many worlds says they do not, so to test who's > right we need a mind that uses quantum properties. Quantum Computers have > advanced enormously over the last 30 years so I wouldn't be surprised if it > or something very much like it is actually performed in the decade or two. > > An intelligent quantum computer shoots photons at a metal plate one at a > time that has 2 small slits in it, and then the photons hit a photographic > plate. Nobody looks at the photographic plate till the very end of the > experiment. The quantum mind has detectors near each slit so it knows > which slit the various electrons went through. After each photon passes the > slits but before they hit the photographic plate the quantum mind signs a > document saying that it has observed each and every photon and knows > which slit each photon went through. It is very important that the > document does not say which slit any photon went through, it only says that > they went through one slit and one slit only and the mind has knowledge of > which one. There is a signed document to this effect for every photon it > shot. > > Now the mind uses quantum erasure to completely destroy its memory of > which slit any of the photons went through; the only part remaining is the > document which states that each photon went through one and only one slit > and the mind (at the time) knew which one. Now develop the photographic > plate and look at it. If you see interference bands then the many world > interpretation is correct. If you do not see interference bands then there > are no worlds but this one and the conventional quantum interpretation is > correct. > > This works because in the Copenhagen interpretation when the results of a > measurement enters the consciousness of an observer the wave function > collapses, in effect all the universes except one disappear without a trace > so you get no interference. In the many worlds model all the other worlds > will converge back into one universe because information on which slit the > various photons went through was the only thing that made one universe > different from another, so when that was erased they became identical again > and merged, but their influence will still be felt, you'll see indications > that the photon went through slot A only and indications it went through > slot B only, and that's what causes interference. > > > John K Clark >
Let's see what Bruce thinks of your test. Suppose we just assume detectors that watch each slit, and record which slit each photon goes through, and later we see no interference pattern -- which I think is what happens. What does this say about the MWI? AG -- 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 post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
