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On Sun, 15 Sep 2024 12:31:29 +0000, Paul.B.Andersen wrote:Interesting.
It is the alternative theories which predict thatTwo paragraphs that I wrote for Wikipedia which are nearly unchanged
the equivalence principle could be violated at very weak levels
that have to be revised, not GR.
>
Because this experiment has shown that the equivalence principle
is NOT violated at very weak levels.
from when I first wrote them a decade ago:
"Proposals that may lead to a quantum theory of gravity such as string
theory and loop quantum gravity predict violations of the weak
equivalence principle because they contain many light scalar fields
with long Compton wavelengths, which should generate fifth forces and
variation of the fundamental constants. Heuristic arguments suggest
that the magnitude of these equivalence principle violations could be
in the 10−13 to 10−18 range.
"Currently envisioned tests of the weak equivalence principle are
approaching a degree of sensitivity such that non-discovery of a
violation would be just as profound a result as discovery of a
violation. Non-discovery of equivalence principle violation in this
range would suggest that gravity is so fundamentally different from
other forces as to require a major reevaluation of current attempts to
unify gravity with the other forces of nature. A positive detection,
on the other hand, would provide a major guidepost towards unification."
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