Nick Herbert finds Ray Jensen's error in his FTL Signal Thought Experiment


On Nov 27, 2005, at 3:13 PM, nick herbert wrote:
Hi Ray--

Your ingenious FTL scheme was forwarded to me by Jack Sarfatti.

Having constructed dozens of such schemes while writing my FTL book (none
of which ever worked) I am familiar with most of the pitfalls a would-be
EPR FTL signaller will encounter.
In your case the problem occurs with your Eq 4 where you give the
for detection of photons at the two interferometer arms. What
you want is the probabilities (amplitudes squared) for each of the two
types of pure-state photons that impinge on the interferometer.

Since these distributions are caused by separate photons (a single photon
interfers with itself) one must add probabilities--not amplitudes as you
have done. When you do this, the sin squared plus cos squared identity
wipes out all fringe variation and the two cases (0 and 1 input) give
exactly the same result at the output.

Ah yes! Now I recall. It's been 15 years since I thought about that. Nick, I think, is correct.


What did you expect? That FTL signalling would be easy?

Mother Nature isn't easy. She wants to be coaxed.

But thanks for trying.

warm regards
Nick Herbert
http://members.cruzio.com/~quanta
http://quantumtantra.com

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On Nov 27, 2005, at 1:52 PM, Jack Sarfatti wrote:

The key is his fig 2 & eq. 3. At the moment, without thinking about it very much, I cannot refute what he claims about eq. 3. Does anyone see the error there? If there is no way to tell which path photon 2 takes then there should be local interference according to Feynman. And it seems there is no way to tell what state photon 1 was in on the left. So why won't it work? Any opinions?


On Nov 27, 2005, at 1:30 PM, Jack Sarfatti wrote:

bcc

Probably this paper is wrong, but I have not yet had time to read it carefully. Any opinions? The author is aware of Stapp's et-al objection.

Begin forwarded message:

From: rjensen2@nd.edu
Date: November 27, 2005 1:14:36 PM PST

Subject: Re: Your STAIF paper

enclosed is a copy per your request. Thank you for your
interest. Sincerely,

Ray Jensen





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