🚀 go-pugleaf

 Communication at a distance instantly with entangled photons.

I have been puzzling over this phenomenon and I have a question.

Start with an interferometer - a device consisting of two mirrors and
two beam splitters. Light entering the interferometer hits a beam
splitter, which sends the light along two optical paths: an upper and a
lower one. The paths recombine at the second beam splitter, which sends
the light to one of two photon detectors. Thus, the interferometer
gives each photon two possible paths between the light source and a
detector. if the lengths of both paths through the interferometer are
adjusted to be exactly equal, the setup effectively becomes the
double-slit experiment. The main difference is that the photon
detectors take the place of the screen that shows bright and dark
fringes. One detector is positioned so that it will detect only the
equivalent of the bright fringes of an interference pattern (call that
detector D-light). The other one records the dark fringes-in other
words, no photon ever reaches it (call that detector D-dark).

Then take 2 entangled photons produced by shining an ultraviolet laser
throug special nontinear optical crystal. When ultraviolet photons from
a laser are directed through the crystal, sometimes then, were
"down-converted" into two daughter photons of lower energy that
traveled off at about 30 degrees from each other.

Send the 2 entangled photons through 2 identical interferometers -
(interferometer-A and interferometer-B) as above, both being of equal
distance from the source.  In both interferometers I presume that no
photon ever reaches the D-dark-A or D-dark-B detector.

Now say we put a pebble in the path of one of the split beams in
interferometer-A - say just before it would enter the second beam
splitter.  Photons would then be able to reach D-dark-A as there would
be no interference from the light path blocked by the pebble.

What happens at D-dark-B in the other interferometer?  Will the photon
passing through interferometer-B resolve itself into a single position
in space at the same moment as its pair in interferometer-A either hit
the pebble or carried on on the other path through the interferometer? 
If so then some such photons will hit D-dark-B.


Richard Neal


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