On 2/9/2020 10:08 PM, smitra wrote:
On 09-02-2020 11:37, Bruce Kellett wrote:
On Sun, Feb 9, 2020 at 7:48 PM smitra <[email protected]> wrote:
On 08-02-2020 07:00, Bruce Kellett wrote:
On Sat, Feb 8, 2020 at 4:21 PM smitra <[email protected]> wrote:
On 08-02-2020 05:19, Bruce Kellett wrote:
No, I am suggesting that Many-worlds is a failed theory, unable
to
account for everyday experience. A stochastic single-world
theory
is
perfectly able to account for what we see.
Bruce
Stochastic single word theories make predictions that violate
those
of
quantum mechanics.
No they don't. When have violations of the quantum predictions
been
observed?
A single world theory must violate unitary time evolution, it has to
assume a violation of the Schrodinger equation. But there is no
experimental evidence for violations of the Schrodinger equation.
While
one can make such assumptions and develop a formalism based on this,
the
issue is then that in the absence of experimental proof that the
Schrodinger equation is going to be violated, one should not claim
that
such a model is superior than another model that doesn't imply any
new
physics.
So what. If Everettian QM doesn't work, as it has been shown to fail
in that is does not recover normal scientific practice, then one must
look to alternative theories. I have not advocated any particular
theory, but a break down of unitary evolution is not such a big deal
-- it is what we observe every day, after all. This is the heart of
the quantum measurement problem.
The focus on Everettian QM to argue against MWI in general is a straw
man attack. The main issue is unitary time evolution. This is a rather
unambiguous thing that one can check in experiments. A breakdown of
unitary time evolution has never been observed.
?? What do you call the measurement implemented by a projection
operator. Are there observations that don't involve a projection?
Brent
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