University of Calgary scientists have overcome an "Achilles' heel" of quantum-based secure communication systems, using a new approach that works in the real world to safeguard secrets.
The team's research -- published in the journal Physical Review Letters back-to-back with similar work by a group from Hefei, China -- also removes a big obstacle to realizing future applications of quantum communication, including a fully functional quantum network.
"I hope that our new quantum key distribution (QKD) system shows to people who take security seriously that QKD has many advantages and is a viable approach to safeguarding secret information," says Wolfgang Tittel, professor of physics and astronomy and the Alberta Innovates Technology Futures Strategic Research Chair in Quantum Secured Communication.
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