China Surpasses United States in Quantum Communications Research - Page 2 - Politics | PoFo

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QUESS lead scientist Pan Jianwei told Reuters that the project has "enormous prospects" in the defence sphere.[10] The satellite will provide secure communications between Beijing and Ürümqi, capital of Xinjiang, the remote western region of China.[10] The US Department of Defense believes China is aiming to achieve the capability to counter the use of enemy space technology.[10] Paramount leader Xi Jinping has prioritised China's space program, which has included anti-satellite missile tests, and the New York Times noted that quantum technology was a focus of the thirteenth five-year plan, which the China government set out earlier that year.[11] The Wall Street Journal said that the launch put China ahead of rivals, and brought them closer to "hack-proof communications".[12] Several outlets identified Edward Snowden's leak of US surveillance documents as an impetus for the development of QUESS, with Popular Science calling it "a satellite for the post-Snowden age".[8][13][14]

China is funding the project as a focus of the thirteenth five-year plan because QUESS provides the state with hack-proof communications. This project is also supported by the University of Vienna where Pan Jianwei was educated. I don't know what happened to the export ban on dual-use goods, or products that have both civilian and military use.

Long-distance entanglement distribution is essential for both foundational tests of quantum physics and scalable quantum networks. Owing to channel loss, however, the previously achieved distance was limited to ~100 kilometers. Here we demonstrate satellite-based distribution of entangled photon pairs to two locations separated by 1203 kilometers on Earth, through two satellite-to-ground downlinks with a summed length varying from 1600 to 2400 kilometers. We observed a survival of two-photon entanglement and a violation of Bell inequality by 2.37 ± 0.09 under strict Einstein locality conditions. The obtained effective link efficiency is orders of magnitude higher than that of the direct bidirectional transmission of the two photons through telecommunication fibers.
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