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- Path: sparky!uunet!mtnmath!paul
- From: paul@mtnmath.UUCP (Paul Budnik)
- Newsgroups: sci.physics
- Subject: Re: Hidden variable theories, was: Uncertainty Princi
- Message-ID: <269@mtnmath.UUCP>
- Date: 10 Sep 92 16:10:54 GMT
- References: <1992Sep4.170847.235@prim> <1992Sep5.071519.16554@asl.dl.nec.com> <1992Sep9.185040.18757@riacs.edu>
- Organization: Mountain Math Software, P. O. Box 2124, Saratoga. CA 95070
- Lines: 40
-
- In article <1992Sep9.185040.18757@riacs.edu>, danforth@riacs.edu (Douglas G. Danforth) writes:
-
- > This assumes that Bell's theorem is a definitive and final answer. For
- > inefficient detectors it is quite easy to construct a model which gives
- > the EXACT quantum mechanical two-particle correlations. Bell's theorem
- > does not address this case of inefficient detectors.
-
- You need to distinguish between Bell's result and the experimental tests
- of it. Bell's theorem implies that quantum mechanics is not a local theory
- and suggests that this should be experimentally detectable. Bell's theorem
- does not address and is not affected by the many practical problems in
- conducting an experiment.
-
- > In summary, at this time, one can NOT make the claim that "Any theory of any
- > form that is consistent with quantum mechanics must also be nonlocal".
-
- Quantum mechanics *is* a nonlocal *theory*. This is a strictly mathematical
- derivation that has nothing to do with experimental results.
- Of course I think quantum mechanics is both not local and not correct.
- I believe this will ultimately be confirmed experimentally.
-
- One problem with testing Bell's inequality is that *no* experiment
- can ever be absolutely conclusive. Two loopholes that can always exist are:
-
- 1. The information is transmitted at superluminal but still finite speed
- and thus locality is preserved.
-
- 2. The results of both experiments including human manipulation
- of a polarizer was predetermined and thus the correlations can
- be produced with out nonlocal effects.
-
- Any real experiment will always have some additional loopholes. Aspect
- was certainly aware that detector efficiency was an issue. I do not
- completely follow your argument about efficiency. If you are saying that
- only those detections that confirmed violations of Bell's inequality were
- detected because of some unknown physical process, I agree that this is
- possible. I am sure the experimenters were aware of this and classified
- it is another improbable but still possible loophole.
-
- Paul Budnik
-