[LINK] To catch a fiber optic spy, look at a single photon
Tue, 06 Jun 2000 16:06:28 +1000
Tony Barry wrote:
> It appears to be an application of quantum mechanical entanglement
> between particles which involves spooky action at a distance stuff
> which seems at first glance to involve travel faster that the speed
> of light.
Schroedinger's Kittens by John Gribbin goes into this stuff.
What caught my eye was the fibre optics/satellite mixture. It really ought
to be one or the other, not both. From what I understand, as long as a
photon does not get measured, it retains certain properties. As soon as it
"lands" the shroedinger wave function collapses and puff goes the "certain
properties". (Puff is a technical term used by electronic engineers trying
to show that they understand quantum physics)
If the photons are in an optical fibre, then OK, If they are propagating
through vacuum/atmosphere then OK. Going from one to the other would loose
information, as it would once the information got into real matter like a
chip or wires.
Of course the problem could be in the reporting. Perish the thought.
He is one of those people who would be enormously improved by death.