- #1
Bertrand
- 17
- 0
Hello !
here is a link towards an article describing an experiment that is a realisation of Wheeler's delayed choice gedanken experiment :
http://arxiv.org/abs/quant-ph/0610241
the conclusion is quite interesting :
"Our realization of Wheeler’s delayed choice
GedankenExperiment demonstrates
beyond any doubt that the behavior
of the photon in the interferometer
depends on the choice of the observable
which is measured, even when that
choice is made at a position and a time
such that it is separated from the entrance
of the photon in the interferometer by a
space-like interval. In Wheeler’s words,
since no signal traveling at a velocity less
than that of light can connect these two
events, “we have a strange inversion of
the normal order of time. We, now, by
moving the mirror in or out have an unavoidable
effect on what we have a right
to say about the already past history of
that photon” (7). Once more, we find
that Nature behaves in agreement with
the predictions of Quantum Mechanics
even in surprising situations where a ten-
sion with Relativity seems to appear (27).
"
Some of the authors claim that this experiment sets some evidence for some kind of "temporal non locality", just like EPR experiments show some "spatial non-locality".
they also claim that this experiment definitively rules out all interpretations of Quantum Mechanics, except the Copenhagen and the Bohm interpretation.
Namely, it rules out all "realistic" interpretations of the nature of the wave function, like Everett's or Zurek's.
Maybe be this subject has already been discussed somewhere else in this forum ?
Bertrand
here is a link towards an article describing an experiment that is a realisation of Wheeler's delayed choice gedanken experiment :
http://arxiv.org/abs/quant-ph/0610241
the conclusion is quite interesting :
"Our realization of Wheeler’s delayed choice
GedankenExperiment demonstrates
beyond any doubt that the behavior
of the photon in the interferometer
depends on the choice of the observable
which is measured, even when that
choice is made at a position and a time
such that it is separated from the entrance
of the photon in the interferometer by a
space-like interval. In Wheeler’s words,
since no signal traveling at a velocity less
than that of light can connect these two
events, “we have a strange inversion of
the normal order of time. We, now, by
moving the mirror in or out have an unavoidable
effect on what we have a right
to say about the already past history of
that photon” (7). Once more, we find
that Nature behaves in agreement with
the predictions of Quantum Mechanics
even in surprising situations where a ten-
sion with Relativity seems to appear (27).
"
Some of the authors claim that this experiment sets some evidence for some kind of "temporal non locality", just like EPR experiments show some "spatial non-locality".
they also claim that this experiment definitively rules out all interpretations of Quantum Mechanics, except the Copenhagen and the Bohm interpretation.
Namely, it rules out all "realistic" interpretations of the nature of the wave function, like Everett's or Zurek's.
Maybe be this subject has already been discussed somewhere else in this forum ?
Bertrand