Scientists have sent the world’s first quantum transmission from earth to a satellite.
Editor’s Remarks: The Chinese team who teleported a photon into space last month have now succeeded in transmitting 300kbit of quantum code 1,400km to its Micius satellite that is orbiting the earth. The code was sent at a transmission efficiency 20 times larger than by using an equivalent length of optical fibre and is “unhackable” as any interceptions would change the quantum state of the code and destruct it. China has taken the lead in the development of quantum teleporting and transmissions and has deployed a local area quantum network in the eastern Chinese city of Jinan, which is part of a 2,000km network being built between Beijing and Shanghai. But they have been focusing on space transmission as the vacuum allows light to travel unimpeded over long distances.