Re: What is "uncertain" in quantum physics?

On 19/05/2025 11:14, Julio Di Egidio wrote:

On 19/05/2025 11:07, Julio Di Egidio wrote:

On 19/05/2025 03:10, x wrote:

On 5/18/25 10:28, Julio Di Egidio wrote:

Why shouldn't we think of the Uncertainty Principle as just a statement
about the limits of observation, rather than about something objective,
especially as in causing some non-zero vacuum energy?
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Is there some experiment that settles "uncertainty" as something "really
there"?  In particular, I am not sure if the expansion of the Universe
is such evidence, or rather a consequence of the theory.
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Thanks for any insight.

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Interesting.  A statement or question actually
about physics.

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LOL, indeed.
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If something is 'quantized' in quantum mechanics
it is actually there [and] not there.
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Take an electron.  It actually has a specific
rest mass or charge.  It does not have an infinite
number of fine degrees of mass or charge.

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But quantisation has nothing to do with uncertainty.
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Unless you are thinking of quantising space-time...?

 I.e. space-time dimensions: so no, at least not until
further notice, as those remain in a first instance
descriptions of observation, the "frames of reference".

Unless you are thinking of quantising *proper* time (!),
but then again, what would be the evidence, theoretical
or experimental, for such a thing?
-Julio