The team of Professor Wang Qin from the Institute of Quantum Information Technology of our school has made new progress in the field of quantum cryptography. For the first time, the team realized the passive decoy quantum digital signature by using the parametric down-converting light source, achieving a safe transmission distance of 200 kilometers, arecord number in the signature experiments. The achievements were published online on September 19 in the internationally authoritative academic journal Physical ReviewApplied.

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URL:https://link.aps.org/doi/10.1103/PhysRevApplied.10.034033

DOI:10.1103/PhysRevApplied.10.034033