On 5/10/2022 8:17 PM, smitra wrote:
On 09-05-2022 00:42, Bruce Kellett wrote:
On Mon, May 9, 2022 at 6:37 AM smitra <smi...@zonnet.nl> wrote:
On 08-05-2022 05:58, Bruce Kellett wrote:
It is when you take the SE to imply that all possible outcomes
exist
on each trial. That gives all outcomes equal status.
All outcomes can exist without these being equally likely. One can
make
models based on more branches for certain outcomes, but these are
just
models that may not be correct.
Such models are certainly inconsistent with the SE. So if your concern
is that the SE does not contain provision for a collapse, then you
should doubt other theories that violate the SE. You can't have it
both ways: you can't reject collapse models because they violate the
SE and then embrace other models that also violate the SE. Either the
SE is universally correct, or it is not.
What matters is that such models can be
formulated in a mathematically consistent way, which demonstrates
that
there is n o contradiction. The physical plausibility of such models
is
another issue.
This has been discussed. To allow for real number probabilities, the
number of branches on each split must be infinite. The measure problem
for infinite numbers of branches has not been solved. It is unlikely
that any consistent measure over infinite numbers of branches can be
defined. So this idea is probably a non-starter. At least other models
have a reasonable chance of success.
As Brent has also pointed out, there amount of information in the
visible universe is finite. But one can also consider observers and
then each observer has a some finite memory so there are only a finite
number of branches the observer can distinguish between.
Quite aside from memory, per Everett there are a bazillion branches that
are only "measured" by the environment and no human is every aware of.
But shall we not consider the "memory of the environment". That's where
decoherence says the classical result gets recorded.
Brent
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