On 20-12-2020 07:57, 'Brent Meeker' via Everything List wrote:
On 12/19/2020 10:38 PM, Bruce Kellett wrote:
On Sun, Dec 20, 2020 at 6:48 AM 'Brent Meeker' via Everything List
<everything-list@googlegroups.com> wrote:
As far as I know, it was Born who came up with the interpretation
of the equations as expressing probabilities. But there was (and
maybe still is) controversy over whether this was irreducibly
random or whether there were hidden variables and it was just the
randomness of ignorance. For most physicists this was resolved by
the experimental confirmation of the violation of Bell
inequalities. At that point the choice was irreducible randomness
or nonlocal effects
That is not quite right. The choice is not between randomnesss and
non-locality. Non-local hidden variables (Bohm) do reduce the
apparent randomness to ignorance of the detailed quantum state, but
at the price of non-locality. Bell's result implies that
non-locality is unavoidable, and this has nothing to do with the
presence or absence of intrinsic randomness.
If there were not intrinsic randomness then the extra correlation of
that violates Bell's inequality could be used to signal faster than
light.
That can indeed be done in Bohm theory. There the Born rule requires the
assumption of so-called "quantum-equilibrium", and that condition can be
violated:
https://en.wikipedia.org/wiki/Quantum_non-equilibrium
Saibal
Brent
It is only deterministic theories like MWI and Bohm that eliminate
randomness, but MWI does not solve the locality issue either.
Besides, MWI is incompatible with the Born Rule; and the Born rule,
while consistent with Bohm, cannot be derived from Bohmian
mechanics.
Bruce
and most physicists saw randomness as the more likely, less
disruptive choice.
Brent
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