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Brad Fitzpatrick

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Quantum entanglement for networking [Aug. 3rd, 2006|11:27 am]
Brad Fitzpatrick
What's the latest on using quantum entanglement for networking?

How fast?
How much power?

etc.
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Comments:
[User Picture]From: teferi
2006-08-03 08:26 pm (UTC)
You wouldn't get speeds any faster than you would with, say, fiber optics, since you still have to send classical information down a classical channel in addition to the quantum information that gets sent by entanglement.
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[User Picture]From: brad
2006-08-03 09:12 pm (UTC)
I don't have fiber optics to my cellphone.
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[User Picture]From: taral
2006-08-03 08:50 pm (UTC)
Quantum entaglement isn't very useful for networking.
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[User Picture]From: brad
2006-08-03 09:13 pm (UTC)
Why not?

I'm legitimately curious, but I'm obviously not Googling the right things.
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[User Picture]From: taral
2006-08-03 09:33 pm (UTC)
Because the states are still random, despite being correlated. Read up on it in wikipedia for detail.
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[User Picture]From: brad
2006-08-03 09:42 pm (UTC)
But with checksums, it's still possible to get reliable data out of it. The question is how fast, and when that's faster than the other possibilities.

Could it be faster/more reliable than cellphones? Or inter-planet communication?
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From: jzedd
2006-08-03 11:18 pm (UTC)
too bad the ansible of "Ender's Game" is fiction
or is it?
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(Deleted comment)
[User Picture]From: brad
2006-08-04 01:32 am (UTC)
Ah. Sad.

Wikipedia to my rescue. (the parts I could read at least)
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[User Picture]From: taral
2006-08-04 02:54 am (UTC)
No, not checksummable. Random. The correlation is that if you know what one end's state ended up as, you know what the other end's state is. But you can't pick the state. So it's a pair of geographically separated random sources with high correlation.
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