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- Path: sparky!uunet!wupost!think.com!spdcc!das-news.harvard.edu!husc-news.harvard.edu!husc8!mcirvin
- Newsgroups: sci.physics
- Subject: Re: mind-numbing gedankenexperiment
- Message-ID: <mcirvin.712019817@husc8>
- From: mcirvin@husc8.harvard.edu (Mcirvin)
- Date: 24 Jul 92 23:16:57 GMT
- References: <2377@nic.cerf.net> <Jul.24.14.22.06.1992.9421@ruhets.rutgers.edu>
- Nntp-Posting-Host: husc8.harvard.edu
- Lines: 29
-
- bweiner@ruhets.rutgers.edu (Benjamin Weiner) writes:
-
- >mitsu@nic.cerf.net (Mitsuharu Hadeishi) writes:
-
- >> [Sarfatti quote] the transmitter photon retarded wave arrives at T and is
- >> detected. Information on the setting of the transmitter at event T is
- >> sent backwards-in-time by an advanced transmitter photon wave. The
- >> advanced wave arrives at S just as the photon pair is being emitted.
- >> This is what Fred Hoyle calls a "loop in time" between events S and T.
-
- >This is meaningless. What is an "advanced photon wave"? I think
- >Sarfatti is trying to talk about advanced and retarded in the sense
- >of potentials in electrodynamics.
-
- I think that what Sarfatti is talking about is a garbled version
- of the "transactional interpretation" of quantum mechanics, in
- which making a measurement in the present causes information to be
- transmitted backwards in time via the time-evolution operator
- (simply using the post-measurement wave function as final-value data
- rather than initial-value data) and subsequently (if that is the right
- word) transmitted forward to all distant places where something
- is correlated with the observable being measured. This interpretation
- is really equivalent to the Copenhagen one in the sense of what it
- predicts. You shouldn't be able to use it to justify superluminal
- communication via "Feynman zig-zag" any more than you could using
- instantaneous collapse.
-
- --
- Matt McIrvin mcirvin@husc.harvard.edu Long live short .sigs
-