On the contrary I think people who cite this as a great failure of QFT
are producing clickbait. No physicist has ever taken the number
seriously. I think it was always a misbegotten number because it's
really calculating the eigenvalue of the energy in a Planck size cube.
But the eigenvalue of the energy is what you would get if you measured
the vacuum energy in that cube. If you really tried to make such a
measurement your instrument would have to supply the energy to define
the Planck cube. Absent a measurment, there's no reason to suppose the
vacuum has all that energy.
Brent
On 4/17/2024 3:29 AM, John Clark wrote:
On Wed, Apr 17, 2024 at 12:07 AM Brent Meeker <meekerbr...@gmail.com>
wrote:
What I said.
https://www.patreon.com/posts/worst-prediction-102409950
This is a good example of why I'm not a big fan of Sabine
Hossenfelder, she's always right and everybody else is always wrong.
In 1967 Yakov Zel’dovich was the first to formally calculate that
value of the cosmological constant based on quantum theory, as we
currently understand it, produces a value that was obviously 120
orders of magnitude too high. Zel’dovich was not stupid enough to
claim that's what the value actually was, he was just pointing out
that Physics had a serious problem. And she complains that you only
get that 10^120 figure if you assume that the Planck length and Planck
mass are important, but if you don't make that assumption then you get
a value that is *infinitely* too high. Hossenfelder is a physicist so
sheknows all this of course, but she loves to be provocative and a
contrarian because it's good Clickbait.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
hjw
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