Harvard University researchers led by Kahn Knauth have created a quantum network in Boston consisting of two nodes connected by a 35-kilometer fiber optic loop. This setup has successfully demonstrated long-term entanglement memory, in which nodes store quantum states down to the second, and has moved us closer to realizing quantum relays required for quantum communication over long distances.
Simultaneously, Xiao-Hui Bao’s team from the University of Science and Technology of China circulated three nodes over a distance of 10 kilometers in Hefei using clouds of supercooled rubidium atoms. Their network efficiently coordinated photons for communication between nodes, despite having a shorter data storage time (100 microseconds); This is an important step for future quantum relays.
These achievements bring the dream of a secure global Internet based on quantum technologies closer to reality and allow the creation of quantum networks from city to city and country to country in the near future.
Source: Ferra
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