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New, exceptionally bright photons bring 'unbreakable' quantum communication closer to reality29/10/2024  © Pitris/Getty Images
A future quantum internet could beam data at much longer distances than previously thought possible thanks to an exceptionally bright light source made by combining existing technologies in a new way.
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David Garner : Futurity : 01 Oct 2015  Image © Pitris/iStock While theoretical proposals for a quantum internet already exist, the problem for scientists is that there is still debate over which technology provides the most efficient and reliable teleportation system. For many people the word "teleportation" conjures up "Beam me up, Scotty" images from Star Trek. But in the last two decades, quantum teleportation—transferring the quantum structure of an object from one place to another without physical transmission—has moved from the realms of science fiction to tangible reality. Quantum teleportation is an important building block for quantum computing, quantum communication, and quantum network and, eventually, a quantum internet. While theoretical proposals for a quantum internet already exist, the problem for scientists is that there is still debate over which technology provides the most efficient and reliable teleportation system. [QUANTUM INFO 'BEAMED UP' VIA DONUT TELEPORTATION] [QUANTUM SYSTEM TELEPORTS AN ATOM] You can read the whole article at: University of York
Since a quantum computer works with qubits, which can have values of 0, 1, or a quantum superposition of both, a quantum Internet would have to able to communicate in qubits. This prototype network accomplishes that by using photons to carry the information around. The team has managed to rig up a laser to fire and hit the first networked atom in a way that the atom preserves its quantum state, but also produces a photon with that information plastered onto it. The photon then shoots off down the fiber optic cable delivering it to the second atom. Network achieved.
On top of that, the researchers managed to get the two networked atoms to entangle, which means the network should be completely scalable to something along the lines of an Internet. The project’s lead researcher, Dr. Stephan Ritter said: “Entanglement of two systems separated by a large distance is a fascinating phenomenon in itself. However, it could also serve as a resource for the teleportation of quantum information. One day, this might not only make it possible to communicate quantum information over very large distances, but might enable an entire quantum internet.” Quantum computers will exponentially increase the power of computing as we know it, and now it looks like we might have a solid network to support them by the time they’re up in working order. The real question is which of these technologies will reach wide scale usability first. –Geek System |
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