Scientists at Peking University in China have cracked how to build long-distance quantum communication networks. In their recent research, the scientists demonstrated secure quantum communication over distances of 2,300 miles (3,700 km).
Even as scientists and companies work on building error-proof quantum computers, the devices could end up being quite worthless if they cannot communicate with each other and transfer information over a quantum network.
This is why researchers have also been working on developing secure quantum networks. Much of the effort has been on ensuring that the quantum networks can utilise existing fiber-optic networks. However, the development of such networks has been marred by prohibitive equipment costs and limited range.
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