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Article #4843

Re: Error in NO FTL Signal Proofs exposed.

#4843
From: MRG3
Date: Thu, 12 Nov 1992 13:29
34 lines
1972 bytes
In article <BxJ3Fz.CKK@well.sf.ca.us>, sarfatti@well.sf.ca.us (Jack Sarfatti)
says:
>
>Trivial, but false, formal proof that quantum connection communication is
>impossible.
>
>Nonlocal joint probability that receiver photon b counted in + channel and
>twin transmitter photon counted in phi channel is
>
>p(b+|a,phi) = <a,b| |+><+| |phi><phi| |a,b>
>
.......
>1) |a,b> can have a parametric dependence on phi so that it is
>mathematically incorrect to use the completeness relation in isolation. So
>that it does not cancel out of the problem destroying the controllable
>nonlocal coherence effect.


For the case of the spin entangled system, Sarfatti is saying that the
initial conditions |a,b> of the spin system depend upon what the observer
at one side of an EPR type experiment cchooses to measure.
The effect of the measuring apparatus
on the system which produces the correlated photon system
still propogates at the speed of light or less.  Hence no effect could be
seen outside of the future light cone of the event "choose to measure phi".
Hence any effect of this sort is due to luminal or subluminal transmission
of information via interaction between one of the detectors and the
coorelated photon source.  I believe it was Paul Budnik who has pointed out
that these type of effects may still not be ruled out in the actual
Aspect experiments.  There are NOT an indication of superluminal
signaling capability.
-mike gallis
freelance physicist
(for hire?)
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From: MRG3@psuvm.psu.edu
Newsgroups: sci.physics
Subject: Re: Error in NO FTL Signal Proofs exposed.
Message-ID: <92317.082912MRG3@psuvm.psu.edu>
Date: 12 Nov 92 13:29:12 GMT
References: <BxJ3Fz.CKK@well.sf.ca.us>
Organization: Penn State University
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