On 7/10/2021 5:35 PM, smitra wrote:
On 11-07-2021 01:05, Bruce Kellett wrote:
On Sun, Jul 11, 2021 at 1:18 AM smitra <[email protected]> wrote:
On 10-07-2021 07:58, Bruce Kellett wrote:
Neither of your analyses actually explain the observed behaviour.
It does so, otherwise the experiment would have proven that QM is
invalid.
So, in your opinion, the quantum mechanical analysis given in the
paper is wrong.
It is correct, it's just that your conclusion about the MWI based on
that paper is incorrect. Escaping infrared photons and the decoherence
this causes are totally irrelevant. Whether or not an interference
pattern can be detected is not relevant to the question of whether or
not a superposition exists when we know that it exist and it has no
decohered. It's just that you then can't reproduce one particular line
of evidence for the validity of quantum mechanics in that particular
experiment.
If I prepare the state of a particle in a superposition and let this
interact in a certain way, then we know how this state will evolve. If
this evolution involves interactions with many particles, then the
system will decohere. Then it may be true that we cannot distinguish
the state of the system from being in a pure or mixed state in
practice due to not being able to conduct an interference experiment
involving a very large number of particles, but quantum mechanics
still tells us that the superposition exists and that if we were to
conduct the right sort of interference experiment, we would see an
interference that would prove that the state is not a mixed state.
But does it exist if part of the information has crossed the Hubble
boundary? Then there is no experiment, even in principle, that would
prove the state is not a mixed one.
Brent
Then given that we don't have any experimental evidence to doubt the
validity of quantum mechanics, saying that the superposition does not
really exists in such a a case, is just silly.
Saibal
Bruce
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