On 10/25/2022 11:40 AM, John Clark wrote:
On Tue, Oct 25, 2022 at 6:21 AM Lawrence Crowell
<[email protected]> wrote:
/> The dynamic collapse models have some observable component to
them that make them testable. It appears they are falsified. Many
Worlds Interpretation and the Hugh Everett idea has no such thing.
It is not testable; it is in a way "safe" from falsificat/
There is no way to falsify the conventional Copenhagen interpretation,
but back in 1986 in his book "/The Ghost in the Atom/" David Deutsch
proposed a way to falsify Everett's Many Worlds; the experiment would
be difficult to perform but Deutsch argues that is not Many Worlds
fault, the reason it's so difficult is that the conventional view says
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.
In Deutsch's experiment, to prove or disprove the existence of many
worlds other than this one, a conscious quantum computer shoots
electrons at a metal plate that has 2 small slits in it. It does this
one at a time. The quantum computer has detectors near each slit so it
knows which slit the various electrons went through. The quantum mind
now signs a document for each and every electron saying it has
observed the electron and knows which slit it went through. It is very
important that the document does NOT say which slit the electron went
through, it only says that it went through one and only one slit and
the mind has knowledge of which one. Now just before the electron hits
the plate the mind uses quantum erasure to completely destroy the
memory of what slits the electrons went through, but all other
memories including all the documents remain undamaged. After the
document is signed the electron continues on its way and hits the
photographic plate. Then after thousands of electrons have been
observed and all which-way information has been erased, 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 interpretation is correct.
It would be trivially easy to create an AI (not even a smart one) to do
this. It's just a quantum erasure Young's slit experiment with a module
what prints out a document saying the which-way information known
before erasure. I
Deutsch is saying that in the Copenhagen interpretation when the
results of a measurement enters the consciousness of an observer the
wave function collapses,
That was Wigner's idea, which he later rejected. Certainly Bohr never
thought the consciousness was necessary to collapse the wave function.
He thought any record of which-way would destroy the interference. This
has subsequently been shown in experiments like the Buckyball double
slit and is given theoretical support by decoherence theory.
Brent
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 when the electrons hit the
photographic film because the two universes will no longer be
different (even though they had different histories), but their
influence will still be felt. In the merged universe you'll see
indications that the electron went through slot X only and indications
that it went through slot Y only, and that's what causes interference.
I know that what I said in the above is a fair representation of
whatDeutschwas saying because some years ago I wrote to him about this
and he said it was an accurate paraphrase.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
74c
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