Professor Stephen Hawking has pleaded with world leaders to keep technology under control before it destroys humanity.
sabato 12 maggio 2012
Quantum Object Teleported 100 Kilometers
Though quantum teleportation has existed for well over 10 years, it has never actually happened at a distance that would be of any use to people in the real world. But for the first time, Chinese researchers were able to teleport a quantum object nearly 100 kilometers, ramping up the real world applications for the idea.
According to Technology Review, the quantum teleportation does not involve dematerializing and then re-materializing physical matter, but rather using a photon to transmit the quantum state of one object to another, thus allowing the recipient to become a clone of the sender (think of it kind of like your consciousness inhabiting someone else's body).
Using a 1.3 watt laser, the scientists developed a guide mechanism that allows a photon to make it from point A to point B without getting lost. Satellite based quantum communications—which could be useful for quantum cryptography—are an application which scientists are particularly excited about. [Technology Review]