China achieves a quantum jump

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Composite photo taken on June 15, 2017 shows a quantum communication ground station in Urumqi, capital of Northwest China's Xinjiang Uygur autonomous region. [Photo/Xinhua] By beaming photons — individual particles of light — between Micius and two receiving ground stations — the Delingha station in Qinghai province and the Lijiang station in Yunnan province, Chinese scientists have shown that these photons could remain entangled despite the stations being more than 1,200 kilometers apart. This distance is 10 times greater than similar tests done on the ground, which are usually conducted using fiber optics or in open air and are susceptible to interference, according to findings published on Friday in Science, an international journal.

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