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China’s Quantum Key Network demonstration. China has the quantum technology to perfectly encrypt useful signals over distances far vaster than anyone has ever accomplished, spanning Europe and Asia, according to a stunning research paper published this year on Physical Review Letters. “We have demonstrated intercontinental quantum communication among multiple locations on Earth with a maximal separation of 7,600 kilometers” say the teams, which are led by Anton Zeilinger at the University of Vienna and by Jian-Wei Pan at the University of Science and Technology of China in Hefei, China. University of Science and Technology of China Bits of [...]