From: scerir (scerir@libero.it)
Date: Mon Jun 17 2002 - 10:50:21 MDT
> Dr Lam sensibly notes: "At the moment we don't know how to teleport a
> single atom."
Quantum state teleportation allows the transfer of the quantum state from
one system to another distant one. This system becomes the new original
as it carries all information the original did and the state of the initial
particle
is erased, as necessitated by the quantum no-cloning [xoxing] theorem.
This is achieved via a combination of an entangled state and a classical
message. [Ok, that's old]
The most interesting case of quantum teleportation occurs when the
teleported state itself is entangled. This procedure is also known as
entanglement swapping and.the nonlocal quantum correlations with
its original partner photon are preserved.
This is an important step for future quantum communication and quantum
computation protocols. Entanglement swapping is the essential ingredient
in quantum repeaters, where it can be used to establish entanglement
between observers separated by larger distances as were possible using
links with individual pairs only.
http://arxiv.org/abs/quant-ph/0201134
Due to those large distances I think that, sooner or later,
there will be a nu hysteria in Oz.
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