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- Newsgroups: sci.physics
- Path: sparky!uunet!well!sarfatti
- From: sarfatti@well.sf.ca.us (Jack Sarfatti)
- Subject: Feynman 30 part I examples of interfering alternatives
- Message-ID: <BxKJGF.293@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Date: Wed, 11 Nov 1992 20:26:38 GMT
- Lines: 33
-
-
- Feynman 30 Examples of interfering alternatives. I
- From Feynman and Hibbs, Quantum mechanics and path integrals:
- p.14 "It is not hard, with a little experience, to tell which kind of
- alternative is involved. For example, suppose that information about the
- alternatives is available (or could be made available without altering the
- result), but this information is not used. Nevertheless, in this case a
- sum of probabilities (in the ordinary sense) must be carried out over
- exclusive alternatives. These exclusive alternatives are those which could
- have been separately identified by the information."
-
- Feynman's use of "information" can be identified with 1-1 correlations to
- orthogonal states of an "environmental" measuring system which are traced
- over in the local detection of the phenomenon.
-
- "When alternatives cannot possibly be resolved by any experiment, they
- always interfere."
-
- This is necessary to get a quantum connection signal - the two alternative
- paths of the transmitter photon for a fixed path of the twin receiver
- photon must interfere. In addition, the exclusive alternatives for the
- detection of the transmitter photon which are traced over at the receiver
- must not wash out the phase information from the transmitter. Henry Stapp
- says that the latter is impossible - but that is adhoc not in the standard
- quantum formalism. If retarded causality is right then Stapp will be
- correct. Therefore, this quantum connection signal experiment is a direct
- test of retarded causality at the individual quantum event level. It is my
- position that retarded causality is a statistical macro- emergent
- phenomenon essentially identical to the arrow of time and the second law of
- thermodynamics.
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