Re: question

asdf a écrit : 
srp wrote:


But paradoxically, the same group of physicist, also readily accepted
the idea of entanglement which was supposedly demonstrated by Aspect
(note that many dispute the interpretation of Aspect's experiment).



Would you say that entanglement is accepted for the most part by the
physics community ? 

Well, yes and no. Many really believe in it, and don't even see the
contradiction with their "simultaneous" :-) belief that action at a
distance is impossible. Others believe it is true and see the
contradiction, but are content that "some day", someone will come
up with a rational explanation, possibly rehabilitating action at
a distance in a form that they can accept. Others again do not
believe in it, but remain discrete on the issue, for reasons
relating to professional status in the community (believing in it
is the currently accepted trend), just like those who do not agree
that GR is the final word on gravitation.

Anyhow, no physicist will discuss the issue in public, like all
touchy subjects, except to vaguely refer you to formal literature.

You will have to make up your own mind on the issue.

have others tried to prove it with other
experiments, and if so what were the results of these experiments ?


Aspect's approach and its refinements are to my knowledge the only
even remotely practical avenue of testing, but even then, the results
will always be a matter of interpretation.

Also then if entanglement is accepted are there any theories as to 
> why it happens.. meaning can it be explained.

None that makes any sense, to my knowledge. Difficult to come up with
a theory that predicts entanglement while at the same time predicting
the impossibility of action at a distance.

Maybe some expert will bring light to the issue.

All theories involving mutual forces of attraction and repulsion
between particles de facto imply instanteneous action at a distance
and all alternate theories not involving mutual forces of attraction
and repulsion, such as SR GR QM imply that instantaneous action at
a distance is impossible, apparently with the notable exception of
entanglement, for reasons that no supporting physicist has ever
been able to clarify.

I guess that answers the above .. people that believe in entanglement
are not able to explain it.. is this then a famous unsolved physics
problem ?


It would seem so. More precisely, a famous unsolved logics problem.

André Michaud
.

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