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South Africa and China establish record-breaking 12,900 km ultra-secure quantum satellite link.
(www.eurekalert.org)
this post was submitted on 20 Mar 2025
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Very cool, I wonder if a quantum link like this needs a clear line of sight. What would be the limits of quantum communication like this? It would be amazing to be able to achieve real time communication between planetary bodies for example.
This is not a "quantum entangled data link", it is a regular radio data link secured using quantum computing to generate encryption keys.
I've read some weird paper about such an analog channel, where something quantum on both sides was used to create another analog signal used kinda as an encryption key. Stumbled upon it trying to understand some things about optics long ago.