On 2/15/2025 1:57 PM, John Clark wrote:
On Sat, Feb 15, 2025 at 4:02 PM Brent Meeker <[email protected]>
wrote:
>> On 2/15/2025 12:19 AM, Quentin Anciaux wrote:
The fact remains: quantum mechanics, as it stands, predicts
self-location uncertainty
> /No it doesn't. /
*If what you say is true then quantum mechanics wouldn't need
probability, it could simultaneously make predictions about momentum
and position to any arbitrary degree of precision, but quantum
mechanics can't do that. Therefore I must conclude that either quantum
mechanics is wrong or you are. *
How does the HUP imply self-locating uncertainty?
**
> /QM as it stands, in textbooks and universities and poles of
practitioners is still majority neo-Copenhagen./
*That's largely true. Textbooks, especially introductory physics ones,
teach you how to use quantum mechanics to make probabilistic
predictions, but they pretty much follow the shut up and calculate
philosophy and don't worry about what quantum mechanics means. For
over a decade the editor of the leading physics journal in the world,
"Physical Review" had a policy of refusing to publish any paper about
the foundations of quantum mechanics without even reading it.
Fortunately that policy has changed, these days you can even win a
Nobel prize for work on foundations.
*
**
> /We're not talking about "reality" here, just an interpretation. /
*That's not true, Many Worlds and objective collapse make different
predictions, one says it happens the other says it doesn't.
Experiments are going on right now to determine who's right, if they
find objective collapse then Many Worlds will be proven wrong.*
How will they know it's "objective"? Every branch of MWI observes
objective collapse. If it were merely subjective you'd need to explain
how there can be records and agreement on it. One alternative to MWI is
QBism which explicitly rejects objective collapse and thereby disagrees
with MWI. So I think somebody is misusing "objective".
Brent
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