[extropy-chat] Teleportation

[Damien Broderick]

At 09:51 PM 8/4/2005 +0100, BillK wrote:

>Has enough quantum weirdness to make your remaining hairs stand on end.

Certainly not:

http://arxiv.org/ftp/quant-ph/papers/0508/0508021.pdf

It is common belief among physicists that entangled
states of quantum systems lose their coherence
rather quickly. The reason is that any interaction
with the environment which distinguishes
between the entangled sub-systems collapses the
quantum state. Here we investigate entangled
states of two trapped Ca+ ions and observe robust
entanglement lasting for more than 20 seconds.