[Chris]
06-10-2006, 09:28 PM
We are now officially one step closer to Star Trek-like teleportation. Two years ago, teleportation between two atoms at a distance of a fraction of a millimeter was achieved. But today, Danish scientist Eugene Polzik and his team of scientists have managed to perform teleportation between two different objects, light and matter, at a distance of 1.6 feet (0.5 meters).
“Our method allows teleportation to be taken over longer distances because it involves light as the carrier of entanglement,” Polzik said.
The mind-boggling stuffs:
A strong laser beam was shined onto a cloud of room-temperature cesium atoms whose spins were all pointing in the same direction and fluctuating according to their given quantum state. The laser became entangled with the collective spin of the cloud, meaning that the quantum states of laser and gas shared the same amplitude but had opposite phases. The goal was to transfer, or teleport, the quantum state of a second light beam onto the cloud.
The group mixed a second, weaker laser pulse with the strong laser and split the superimposed beams into two arms. A detector in one arm measured the sum of the beams’ amplitudes and a detector in the second arm measured the difference between their phases. Neither measurement disturbed the delicate entangled state between the light and cesium. But the researchers could use the results to apply a precise magnetic field to the cesium vapor that effectively canceled out the ensemble’s original spin state and replaced it with one that corresponded to the polarization of the weak pulse, as they report in the 5 October Nature.
But this technology is really more like transferring of information at incredible speed than “real” teleportation. So to get beamed up by Scotty is still a long way ahead. Rather than for teleportation purposes, the technology can best be applied to the creation of ultra-powerful computers and super-secure encryption systems. Sounds just as fun as teleportation around the world! Ok, maybe not.
http://www.hiptechblog.com/wp-images/quantumteleportation_01.jpg
Source - www.hiptechblog.com (this is not mine i just copied it for people)
“Our method allows teleportation to be taken over longer distances because it involves light as the carrier of entanglement,” Polzik said.
The mind-boggling stuffs:
A strong laser beam was shined onto a cloud of room-temperature cesium atoms whose spins were all pointing in the same direction and fluctuating according to their given quantum state. The laser became entangled with the collective spin of the cloud, meaning that the quantum states of laser and gas shared the same amplitude but had opposite phases. The goal was to transfer, or teleport, the quantum state of a second light beam onto the cloud.
The group mixed a second, weaker laser pulse with the strong laser and split the superimposed beams into two arms. A detector in one arm measured the sum of the beams’ amplitudes and a detector in the second arm measured the difference between their phases. Neither measurement disturbed the delicate entangled state between the light and cesium. But the researchers could use the results to apply a precise magnetic field to the cesium vapor that effectively canceled out the ensemble’s original spin state and replaced it with one that corresponded to the polarization of the weak pulse, as they report in the 5 October Nature.
But this technology is really more like transferring of information at incredible speed than “real” teleportation. So to get beamed up by Scotty is still a long way ahead. Rather than for teleportation purposes, the technology can best be applied to the creation of ultra-powerful computers and super-secure encryption systems. Sounds just as fun as teleportation around the world! Ok, maybe not.
http://www.hiptechblog.com/wp-images/quantumteleportation_01.jpg
Source - www.hiptechblog.com (this is not mine i just copied it for people)