On 7/4/2021 8:01 AM, John Clark wrote:
On Sun, Jul 4, 2021 at 9:07 AM Lawrence Crowell
<goldenfieldquaterni...@gmail.com
<mailto:goldenfieldquaterni...@gmail.com>> wrote:
> /I can imagine this being worked without MWI. The nonlocality of
the gravitation field and the locality of QFT means that with
spacetime formed by entanglements of quantum states or fields,
that locality and nonlocality may be shifted around. Decoherence
and the transition of a quantum state or entanglement to a
decoherent set may be thought of as a nonlocal process./
Maybe the above can be imagined, but it's a whole lot easier imagining
many worlds.I keep thinking of epicycles in astronomy, one needs to go
through a lot of strenuous mental gymnastics to avoid the obvious
conclusion that many worlds exist.
> /This may be worked so the objective collapse in GRW is such a
shift. /
I think GRW should be ruled out by Occam's razor, it requires extra
terms be added to Schrodinger's equation which make it more difficult
to solve and do not improve its ability to make predictions of
observable events, in fact it makes the predictions worse because
unlike Dirac's Equation or Many Worlds it is not compatible with
Special Relativity.
>/There are quantum interpretations that are ψ-epistemic,
Copenhagen Interpretation, Qubism etc and those that are ψ-ontic
such as Many Worlds or Bohm interpretations. I think there is no
decision procedure that can ever tell us which of these sets
quantum physics sets within. I would then say which ever one of
these you work with is a matter of your choice. I suspect there is
no way we can ever know for sure which of these is correct,/
I think I mentioned before that in David Deutsch's book "The Ghost In
The Atom" he proposed an experimental test that would be very
difficult, but not impossible, to performthat could decide between
Copenhagen and Many Worlds; and the reason it's so difficult is not
Many Worlds fault, the reason 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
propertiesand algorithms.
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 photons 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 a
photon went through, it only says that it went through one slit and
only one slit and the mind has knowledge of which one. There is a
signed document to this effect for every photon it shoots.
Now the mind uses quantum erasure to completely destroy its memory of
which slit any of the photons went through; the only part remaining in
the universe 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 ambiguous evidence that the photon went
through slot A only and ambiguous evidence it went through slot B
only, and that's what causes the interference pattern.
And it doesn't work because it assumes that which-way can be both
observed and yet quantum erased. That's contrary to decoherence theory
of "observed" and assumes some magic "quantum consciousness", hiding the
problem behind a lack of definition of consciousness.
Brent
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
8b4m
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