Re: TECH: Quantum Head Job

From: John Clark (
Date: Wed Oct 10 2001 - 00:25:28 MDT

Adrian Tymes <> Wrote:

> All this [entangled pairs] does is make the communication instantaneous,

No it does not, in fact you can't use entangled pairs for communication
at all, not at any speed. Yes I can change something here and it instantly changes
something a billion light years away, but that's not good enough because it just
changes one apparently random state of the receiver into another apparently
random state. It is only when the sender and receiver compare notes, and that
can only be done at the speed of light or less, does the connection between
the two become obvious.

Quantum teleportation can convey information but it's hard to do and no faster
than light, probably the only time it would be worth the trouble is to get information
into and out of a quantum computer. You could use it for quantum encryption too
but the are other ways to do that and I think they are easier.

            John K Clark

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