Friday, July 06, 2007

Beam Me Up

I've always been interested in the concept of teleportation after watching the characters in Star Trek do it. If one were easily able to teleport, think of the time, energy, and money, one could save. So it was of great interest to read the scientists are working on teleportation. Read the latest:

"Researchers from UQ's Australian Research Centre for Quantum Atom Optics (Dr Ashton Bradley, Dr Simon Haine and Dr Murray Olsen) and Australian National University (Joseph Hope) have proposed a new way of teleporting matter waves. “We propose a scheme which allows an atom laser beam to disappear at one location and reappear at another,” Dr Bradley said.

“We feel that our scheme is closer in spirit to the original fictional concept,” Dr Haine said.

“What differentiates our scheme from what is usually termed quantum teleportation is that our scheme does not require the sender and receiver to share entangled states, as there is no measurement step involved in sending the information.

In this scheme the sender and receiver require a reservoir of extremely cold atoms, known as a Bose-Einstein condensate (BEC).

BEC is a state of matter that occurs when atoms become very cold, (about 100 billionths of a degree about absolute zero).

Due to a phenomenon known as Bose-Enhancement, all the atoms like to act the same way. This causes the atoms to act as one macroscopic matterwave, rather than a collection of individual atoms.”

Dr Haine said that sending a pulse of atoms towards a trapped condensate (BEC) and illuminating them with a control laser beam, the atoms from the pulse were stimulated to act the same way as the atoms already trapped in the BEC.

This resulted in the emission of a photon. As all the atoms in the BEC had a very well-defined momentum, the photons being emitted would follow the same direction and form a signal beam."

You can read the rest here.

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