“QUANTUM BREAKTHROUGH COULD PAVE THE WAY FOR FUTURE ENCRYPTED INTERNET”
at the University of Science and Technology in Hefei, China have
successfully beamed ‘entangled’ particles of light from a satellite with
a specialized quantum optical payload to ground stations, paving the
way for a future global quantum internet.
The experiment relied on the world’s first quantum-enabled spacecraft - a Chinese satellite called Micius. As it travelled over China, the satellite created pairs of photons with properties that were linked through quantum entanglement. It then beamed these simultaneously to three ground stations - travelling up to 2,000 km (1,240 miles) before reaching their destination.
Researchers believe that by linking particles in this way, encrypted information could be sent all around the world across a quantum network with no danger of anybody decrypting and reading the content, as can be done currently on the existing internet.
“It’s an important step towards a worldwide quantum network,“ said Anton Zeilinger at the Vienna Centre for Quantum Science. "If you envisage a quantum network, the question is how to cover large distances and that cannot be done with glass fibres on the ground. You have to go into space, because in glass fibres you lose the signal. It’s very important to show that it works with satellites, so I’m very excited by this.”
Read more about this fascinating story at: https://www.theguardian.com/science/2017/jun/15/scientists-make-quantum-leap-towards-a-secure-new-kind-of-internet
Image: Timelapse of laser-guided satellite-to-earth link of Micius to an observatory at Ali