Why quantum cryptography could be a one-way street

Newsgroups	sci.physics
From	Sam Wormley <swormley1@gmail.com>
Subject	Why quantum cryptography could be a one-way street
Date	2016-04-28 16:02 -0500
Message-ID	<ho2dnSSKYJbO57_KnZ2dnUU7-RmdnZ2d@giganews.com> (permalink)

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Why quantum cryptography could be a one-way street
> http://physicsworld.com/cws/article/news/2016/apr/28/why-quantum-cryptography-could-be-a-one-way-street



> The idea of quantum nonlocality was first discussed in a famous paper
> published by Albert Einstein, Boris Podolsky and Nathan Rosen in
> 1935. The trio described a thought experiment designed to illustrate
> the inadequacies of Niels Bohr's interpretation of quantum mechanics,
> in which an object being measured and the measuring device are
> regarded as one inseparable whole. Einstein, Podolsky and Rosen
> argued that either information could travel instantaneously between
> two points (so apparently contradicting special relativity) or
> quantum theory was incomplete; in other words, "hidden variables"
> were needed in addition to the wavefunction to describe physical
> reality.

> As it turned out, Bohr was vindicated. Physicists have gone on to
> acquire compelling, if not completely watertight, evidence for
> nonlocality, and have exploited the phenomenon in
> quantum-communications technology. The most familiar example is
> quantum entanglement, put forward by Erwin Schrödinger in response to
> the paper by Einstein and colleagues, in which pairs of quantum
> particles can be prepared such that even when placed a long way away
> from each other, a measurement on one of them instantaneously fixes
> the state of the other. However, there are other forms of
> nonlocality, including the stronger Bell nonlocality, discovered by
> the Northern-Irish physicist John Bell, which is inconsistent with
> the theory of local hidden variables.


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Why quantum cryptography could be a one-way street Sam Wormley <swormley1@gmail.com> - 2016-04-28 16:02 -0500
  Re: Why quantum cryptography could be a one-way street jimp@specsol.spam.sux.com - 2016-04-28 21:20 +0000

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