[ExI] Many Worlds wins another one

[John Clark]

Roger Penrose had proposed a rival to Everett's Many Worlds as an
Interpretation of quantum mechanics. In his Idea the Quantum Wave Function
really does physically collapse and timing of the collapse depends on a
random element and on gravity and thus on the mass density of particles in
superposition; the more massive the object the shorter the time before the
wave collapses and Penrose said that was the reason our everyday macro
world appears to follow classical physics to an excellent approximation.
However in the September 7 2020 issue of the journal Nature Physics there
is a report of an experiment done in a laboratory deep under the GranSasso
Mountain in Italy that produced results that are NOT compatible with
Penrose's theory.

Underground test of gravity-related wave function collapse
<https://www.nature.com/articles/s41567-020-1008-4>

Test of wave function collapse suggests gravity is not the answer
<https://phys.org/news/2020-09-function-collapse-gravity.html>

John K Clark
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