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This story is from the category Connectivity
Date posted: 22/05/2012 Anton Zeilinger’s group (Institute for Quantum Optics and Quantum Information at the University of Vienna) has just submitted an arXiv paper claiming that they’ve demonstrated “quantum teleportation“ over a distance of 143 km (89 miles) in the Canary Islands. If confirmed, this sets a new world’s distance record in quantum teleportation, and also sets the stage for a future global quantum network for secure satellite communications. On May 9, researchers at the University of Science and Technology of China in Shanghai claimed that they had demonstrated quantum teleportation at a distance of 97 km (60 mi) across a lake in China. The previous published distance record was 16 km. Quantum teleportation is actually not about teleporting matter — it’s the process of transferring the exact information about a particle from one place to another, using quantum entanglement, without the particle traveling through the intervening space. In a related development, Space-QUEST, Zeilinger’s project on quantum entanglement for space experiments, demonstrated the exchange of a single photon between a low-Earth-orbit satellite and an Earth-based telescope in March 2008. This wasn’t active communications, because the satellite only had a mirror, no quantum laser source. Their next step would be to install an active quantum laser on an external payload of the International Space Station, the researchers say. See the full Story via external site: www.kurzweilai.net Most recent stories in this category (Connectivity): 22/05/2013: New World Record in Wireless Data Transmission |
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