China sets new record for quantum entanglement en route to build new communication network - Politics Forum.org | PoFo

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IN A bid to build an entirely new kind of internet — completely secure and impervious to hackers — China has pulled off a major feat in particle physics.

Chinese scientists have set a new distance record for beaming a pair of entangled particles: photons of light that behave like twins and experience the exact same things simultaneously, even though they’re separated by great distances.

The principle is called quantum entanglement and it’s one of the subatomic world’s weirdest phenomena. And China has smashed the distance record for quantum entanglement.

In a groundbreaking experiment led by Professor Jian-Wei Pan of Hefei University in China, a laser on a satellite orbiting 480 kilometres above the earth produced entangled photons.

They were then transmitted to two different ground-based stations 1200 kilometres apart, without breaking the link between the photons, the researchers said in a report published in the journal Science.

That distance achieved in the experiment is 10 times greater than the previous record for entanglement and is also the first time entangled photons have been generated in space.

“It’s a huge, major achievement,” Thomas Jennewein, physicist at the University of Waterloo in Canada, told Science. “They started with this bold idea and managed to do it.”

China launched its first quantum satellite in August and if all goes according to plan will send up plenty more to create a system of communication which relies on entanglement.


http://www.news.com.au/technology/scien ... cab49ec507

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