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quantum telephone

Old Aug 19, 2002 | 12:39 PM
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Default quantum telephone

http://story.news.yahoo.com/news?tmpl=stor...819/tc_nf/19055

The future of telecommunications may hinge on a clever new version of a device from its past, physicists claim. What the Bell telephone is to communication across town or overseas, the Bell telegraph -- named for British physicist J.S. Bell -- may become to communication across the solar system or even the Milky Way.
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Old Aug 19, 2002 | 01:00 PM
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Sub-space communication, and everyone laughed at Star Trek.
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Old Aug 19, 2002 | 02:13 PM
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There are serious shortcomings in the ability of quantum entanglement to serve as a communication tool. The article doesn't address any of them.

It's pop-science.

- Warren
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Old Aug 19, 2002 | 02:18 PM
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[QUOTE]Originally posted by chroot
[B]There are serious shortcomings in the ability of quantum entanglement to serve as a communication tool.
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Old Aug 19, 2002 | 02:32 PM
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1) The particles must be entangled a priori to be usable. You can't just plug your quantum telephone into the network and start yapping.

2) The entanglement process always involves a collision. The two entangled particles are then moving at high velocities away from each other. The act of slowing them down (so they can be stored in your quantum phone) must involve another collision, and the entanglement will be lost.

3) You can't ever know when someone is sending you a message on your quantum phone, because you can't look at the state of your entangled particles without disturbing them, and that disturbance will ruin the entanglement.

There are others, give me a moment to get my head straight.

- Warren
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Old Aug 19, 2002 | 02:40 PM
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"In practice, such a device would present monumental engineering hurdles that might be overcome by futuristic engineers,"
RELAX!!!!

sheesh...
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Old Aug 19, 2002 | 02:46 PM
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There are not just engineering challenges -- there are fundamental physical challenges.

- Warren
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Old Aug 19, 2002 | 05:32 PM
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ummm that's what engineering does...solve physical challenges...unless your on nickelodeon and watching double dare then it's just a bunch of punk ass kids jumping into vats of slime.
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Old Aug 19, 2002 | 05:36 PM
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nickelodeon... interesting reference.

But... I have to disagree... engineers don't overcome physical challenges. They learn to make the most of their confines.

- Warren
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Old Aug 19, 2002 | 06:13 PM
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okay, workaround them. ing semantics.
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