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Quantum Teleportation Achieved With 90% Accuracy Over 44km Distance

By IQT News posted 01 Jan 2021

(ScienceAlert) Scientists are edging closer to making a super-secure, super-fast quantum internet possible: they’ve now been able to ‘teleport’ high-fidelity quantum information over a total distance of 44 kilometres (27 miles).
Both data fidelity and transfer distance are crucial when it comes to building a real, working quantum internet, and making progress in either of these areas is cause for celebration for those building our next-generation communications network. In this case the team achieved a greater than 90 percent fidelity (data accuracy) level with its quantum information, as well as sending it across extensive fibre optic networks similar to those that form the backbone of our existing internet.
“We’re thrilled by these results,” says physicist Panagiotis Spentzouris, from the Fermilab particle physics and accelerator laboratory based at the California Institute of Technology (Caltech).
It’s never before been demonstrated to work over such a long distance with such accuracy, and it brings a city-sized quantum network closer to reality – even though there are still years of work ahead to make that possible.

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