The quantum internet promises to allow for super-secure communication - and now we know information really can teleport between unconnected nodes in such a network
Shutterstock/Jurik Peter; Kohji Asakawa/Pixabay
A quantum network can teleport information between unconnected nodes using so-called quantum entanglement – an important step towards building a super-secureObjects that share a quantum entanglement have linked properties. Entanglement is central to proposals for a quantum internet, which could greatly improve privacy compared with current internet systems.
“It’s really teleportation as in science-fiction movies,” says Hanson. “The state, or information, really disappears on one side and appears on the other side, and because it’s not travelling the space in between, [the data] can also not get lost.
Building a quantum internet network doesn’t offer any increases in speed over a conventional system, even though two nodes in the network change at the same instant. This is because users sharing information about changes to the network must do so through traditional, non-quantum communication. But a quantum web does offer truly private functions, such as eavesdropping-proof communication or data servers that can never discover the source of data they are crunching.
While Hanson and his team is the first to build and test a quantum network in which non-neighbouring nodes are entangled, other teams have been experimenting with different kinds of
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