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- Xref: sparky sci.physics:22053 alt.sci.physics.new-theories:2682
- Path: sparky!uunet!mtnmath!paul
- From: paul@mtnmath.UUCP (Paul Budnik)
- Newsgroups: sci.physics,alt.sci.physics.new-theories
- Subject: Re: Budnik's proposed experiment (was Re: temporally undecided states)
- Message-ID: <466@mtnmath.UUCP>
- Date: 3 Jan 93 16:50:27 GMT
- References: <31DEC199211004292@author.gsfc.nasa.gov> <1993Jan2.230747.3000@cs.wayne.edu>
- Followup-To: sci.physics
- Organization: Mountain Math Software, P. O. Box 2124, Saratoga. CA 95070
- Lines: 54
-
- In article <1993Jan2.230747.3000@cs.wayne.edu>, atems@igor.physics.wayne.edu (Dale Atems) writes:
- >[...]
- > First, I don't see what the measurement of delays has to do with
- > testing Bell's inequality. If the probability of joint detections
- > falls outside a certain limit, then Bell's inequality is violated. The
- > angular dependence of this probability is relevant. How long it takes
- > for the probability to change when the polarizer angle changes isn't.
-
- Bell's inequality is *only* predicted to hold if the relevant events
- are space-like separated. The relevant events are the correlated detections
- and the experimental manipulations that alter the probability of joint
- detections. It is easy to generate results that violate
- the mathematical relationship of Bell's inequality using local processes.
- Measuring the delays is crucial. Without such a measurement you cannot
- claim Bell's inequality is violated.
-
- > Second, if QM plus quantum measurement theory cannot, even in
- > principle, predict the distribution of delays your experiment is
- > designed to measure, then it is incomplete. Not merely EPR-incomplete,
- > but *really* incomplete. That's a very big deal.
-
- This is what I am claiming and I think it is a big deal. The 60 year old
- debate about the completeness of quantum mechanics is decided. Einstein
- was correct about this all along.
-
- > It seems to me that
- > this issue has to be resolved before it makes any sense to try to
- > interpret the possible outcomes of your proposed experiment.
-
- That is why a submitted a paper to Physical Review Letters.
-
- > Third, QM does *not* predict that locality is violated. If it fails to
- > predict the delays, then it is incomplete. The "only" thing that casts
- > doubt on is its usefulness as the basis for a description of nature.
-
- Well QM does not predict these delays it puts constraints on them.
- Thus it still predicts that locality is violated. If these delays turn
- out to be consistent with locality, as I expect they will be, then QM is
- not just incomplete, it is false. However, it is only one aspect of QM
- that is tested by measuring these delays: the assumption that the wave
- function changes instantaneously when a measurement is made.
- This assumption is almost never used to solve practical problems in QM.
- Thus the experiments will not call into question anything of practical
- significance in physics.
-
- On the other hand, if these delays are consistent with
- locality these experiments will open a window on an entirely new class
- of physical phenomena. If the wave function does not change instantaneously
- then it undergoes some nonlinear structural change that is completely
- outside of any existing theory. Understanding the structure of these
- changes could be as important as QM itself. Bell's inequality may open
- an experimental window on a new class of physical phenomena.
-
- Paul Budnik
-