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- Newsgroups: sci.physics
- Path: sparky!uunet!well!sarfatti
- From: sarfatti@well.sf.ca.us (Jack Sarfatti)
- Subject: Feynman 26 "Is it unitary?"
- Message-ID: <BxBBDE.9up@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Date: Fri, 6 Nov 1992 20:53:37 GMT
- Lines: 20
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- Feynman 26 "Is it unitary?"
- p.258 from James Gleick's GENIUS: ( March 30, 1948 Poconos Meeting)
- ""Feynman explained his path integrals, an alien idea, and his positrons
- moving backward in time, even more disturbing. Teller caught the apparent
- infringement of the exclusion principle and refused to accept Feynman's
- inrigorous justification. It struck Feynman that everyone had a favorite
- principle or theorem and he was violating them all. When Dirac asked, 'Is
- it unitary?' Feynman did not even know what he meant. Dirac explained: the
- matrix that carries on from the past to the future had to maintain an exact
- bookkeeping of total probability. But Feynman had no such matrix. The
- essence of his approach was a view of past and future together, with the
- freedom to go forward and backward in in time at will. .... Feynman knew he
- had failed. At the time he was in anguish. Later he said simply: 'I had
- too much stuff. My machines came from too far away.'"
- - indeed, from the future!
-
- PS "A Half-Assedly Thought-Out Pictorial Semi-Vision Thing" p.p. 241-251 is
- a superb piece of pop writing on quantum mechanics.
-
-