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To: American in Israel

At the quantum level, merely measuring something affects it. You may have heard it said that you can know the location, but not the velocity, or the velocity but not the location?
See my tag line and look it up. It is all probabilities until a measurement is made.


28 posted on 05/06/2013 8:39:57 PM PDT by ImaGraftedBranch (...By reading this, you've collapsed my wave function. Thanks.)
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To: ImaGraftedBranch

I guess I am too old for the smoke and mirrors method of science. I prefer physics to metaphysics.


30 posted on 05/07/2013 6:54:30 AM PDT by American in Israel (A wise man's heart directs him to the right, but the foolish mans heart directs him toward the left.)
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To: ImaGraftedBranch; Jeff Winston; American in Israel; LibWhacker
    If I read the data stream by light leakage off of a fiber with a photodiode, it would not change the quantum data one bit. This is horse pucky.

      At the quantum level, merely measuring something affects it. You may have heard it said that you can know the location, but not the velocity, or the velocity but not the location?

This is well known as Heisenberg Uncertainty Principle aka Uncertainty Principle or Heisenberg Effect, or in layman's terms, object under observation changes its behaviour or state and is therefore unmeasurable, or as stated by Werner Heisenberg, "The more precisely the position is determined, the less precisely the momentum is known in this instant, and vice versa."

Ref: Heisenberg - Quantum Mechanics, 1925-1927: The Uncertainty Principle

They key exchange is a slight variation of or not that much different from PGP (Pretty Good Privacy) public-private/symmetric keys mechanism, developed and published by Phil Zimmermann in the early 1990s, except in this case it's fortified by the use of quantum mechanics to make even the key exchange impossible to tap without breaking communication.

Nothing here is revolutionary, the idea of the practical and inexpensive secure quantum net communications using fiber optics (or even "fixed wireless" lasers) has been around for more than 15 years. The scalability has been tested and established when Abilene Project gave way to Internet2 in 2007.

Refs:

Pretty Good Privacy

Phil Zimmermann

32 posted on 05/07/2013 6:56:47 PM PDT by CutePuppy (If you don't ask the right questions you may not get the right answers)
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