On 10/28/2022 3:06 PM, Bruce Kellett wrote:
On Sat, Oct 29, 2022 at 3:16 AM smitra <[email protected]> wrote:
On 26-10-2022 01:40, Bruce Kellett wrote:
> The laws of physics tell us that measurements are irreversible.
> Unitary evolution is universal only in your imagination. Many Worlds
> is an interpretation, not an established fact.
>
> Bruce
The laws of physics as we know them today, rule out the existence
of any
physical process that is fundamentally irreversible. So, measurements
cannot be irreversible if the known laws of physics are correct.
But we know for a fact that the laws of physics as we know them today
are not correct.
If you
disagree then it's up to you to point to just a single example of
such a
process and write up an article that proves your point and get that
published in a per reviewed journal.
Quantum field theory does not include gravitation. I don't have to
write a paper about
this because many people have already done so.
Simply saying that QM as traditionally formulated considers
measurement
as a special process that os irreversible, doesn't cut it, because
measurement is then not treated in terms of the fundamental
dynamics of
the theory, it is put in in an ad hoc way.
Lots of things are put into physics in an ad hoc way. The Born rule is
a prime example -- it is just
imposed on the quantum wave function in an ad hoc way -- it cannot be
derived from the fundamental theory.
But by Gleason's theorem it's the only consistent way to put a
probability measure on Hilbert space.
Brent
Bruce
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