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Can anyone explain (in layman-like terms) how one goes about transporting a single photon over a distance of 1.3km? I really like to have a general idea of the
by crishoj 11y ago
Can anyone explain (in layman-like terms) how one goes about transporting a single photon over a distance of 1.3km? I really like to have a general idea of the technology involved.
"The researchers started with two unentangled electrons sitting in diamond crystals held in different labs on the Delft campus, 1.3 kilometres apart. Each electron was individually entangled with a photon, and both of those photons were then zipped to a third location."
- gus_massa 11y agoThey use a optic fiber. This version has mare technical details, but is still understandable: http://arstechnica.com/science/2015/08/experiment-confirms-that-quantum-mechanics-scoffs-at-our-local-reality/ http://arstechnica.com/science/2015/08/experiment-confirms-t... (HN: https://news.ycombinator.com/item?id=10141658 https://news.ycombinator.com/item?id=10141658 (4 points, 12 hours ago, 1 comment)) > To get around this, the researchers started with the diamonds over a kilometer apart in two different labs at the Delft University of Technology. They entangled each electron spin with a photon, then sent the photons over fiber optic cable to a third lab somewhere in between. There, the photons were entangled, which in turn caused the electrons in the diamonds to be entangled as well.
- crishoj 11y agoAnother enlightening point is that there is a significant loss in the optic fibers: > The whole process was horribly inefficient, with a success rate of 6.4 × 10−9, mostly because photons kept getting lost in the fiber optic cables. But, over the course of nine days, the setup managed to successfully entangle the nitrogen vacancies 245 times.