According to the official microblogging of China University of Science and Technology disclosed the day before yesterday, PAN Jian-wei team and collaborators using linear optical system in 20 km of fiber-optic lines to achieve a quantum fingerprint recognition, breaking the classic limit for the first time in the channel capacity to achieve the classic Communication beyond. The results recently published in the authoritative international academic journal "Physical Review Letters."
It is understood that quantum fingerprinting theory put forward in 2001, but subject to a variety of technical conditions, the international experiments in the past failed to break the classic limit. Pan Jianwei group set up a 20 km long double Sagnac interferometer with active phase compensation, combined with ultra-low noise superconducting nanowire single-photon detector developed by the Shanghai Institute of Microsystem Superconductivity Laboratory, the ultimate realization of the transmission information than the classical limit 84% lower quantum fingerprint recognition. The laboratory is not only the world's first breakthrough in the classical limit of quantum fingerprinting, but also for the first time observed in the quantum channel capacity than the classical channel superiority.
Reviewers are highly praised for the importance of this work, praising the experiment as "an important application that provides quantum information beyond quantum key distribution," and the physical world under the European Physical Society website The work was covered by reports quoting Norbert Luetkenhaus, an internationally renowned expert on quantum communication, "This study will open up a great many other applications in quantum communication."
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