Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.

中文翻译：

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城市“量子互联网”示范是迄今为止最先进的

实验在三个真实城市的光纤上产生了量子纠缠，标志着可能具有革命性应用的网络的进展。