[lit-ideas] THIS is fun (teleportation & stuff)
- From: JimKandJulieB@xxxxxxx
- To: lit-ideas@xxxxxxxxxxxxx
- Date: Wed, 4 Oct 2006 22:55:25 EDT
I don't understand all of this (I nee teleporting for dummies) but the parts
I do understand are exciting and fascinating. Any scientists out there?
Julie Krueger
_Click here: CNN.com - Scientists teleport two different objects - Oct 4,
2006_
(http://www.cnn.com/2006/TECH/science/10/04/teleportation.reut/index.html)
LONDON, England (Reuters) -- Beaming people in Star Trek fashion is still in
the realms of science fiction but physicists in Denmark have teleported
information from light to matter bringing quantum communication and computing
closer to reality.
Until now scientists have teleported similar objects such as light or single
atoms over short distances from one spot to another in a split second.
But Professor Eugene Polzik and his team at the Niels Bohr Institute at
Copenhagen University in Denmark have made a breakthrough by using both light
and
matter.
"It is one step further because for the first time it involves teleportation
between light and matter, two different objects. One is the carrier of
information and the other one is the storage medium," Polzik explained in an
interview on Wednesday.
The experiment involved for the first time a macroscopic atomic object
containing thousands of billions of atoms. They also teleported the information
a
distance of half a meter but believe it can be extended further.
"Teleportation between two single atoms had been done two years ago by two
teams but this was done at a distance of a fraction of a millimeter," Polzik,
of the Danish National Research Foundation Center for Quantum Optics,
explained.
"Our method allows teleportation to be taken over longer distances because it
involves light as the carrier of entanglement," he added.
Quantum entanglement involves entwining two or more particles without
physical contact.
Although teleportation is associated with the science-fiction series Star
Trek, no one is likely to be beamed anywhere soon.
But the achievement of Polzik's team, in collaboration with the theorist
Ignacio Cirac of the Max Planck Institute for Quantum Optics in Garching,
Germany, marks an advancement in the field of quantum information and
computers,
which could transmit and process information in a way that was impossible
before.
"It is really about teleporting information from one site to another site.
Quantum information is different from classical information in the sense that
it cannot be measured. It has much higher information capacity and it cannot
be eavesdropped on. The transmission of quantum information can be made
unconditionally secure," said Polzik whose research is reported in the journal
Nature.
Quantum computing requires manipulation of information contained in the
quantum states, which include physical properties such as energy, motion and
magnetic field, of the atoms.
"Creating entanglement is a very important step but there are two more steps
at least to perform teleportation. We have succeeded in making all three
steps -- that is entanglement, quantum measurement and quantum feedback," he
added.
Copyright 2006 _Reuters_ (http://www.cnn.com/interactive_legal.html#Reuters)
. All rights reserved.This material may not be published, broadcast,
rewritten, or redistributed.
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