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on the evening of october 2, at a press conference held by the micius quantum technology foundation, two internationally renowned scientists in the field of quantum communication - professor nicolas gisin from the university of geneva in switzerland and the university of konst in germany, and the university of bristol in the uk. john rarity was awarded the 2023 micius quantum prize for their important contributions to early quantum key distribution experiments using optical fibers.

at an online press conference held that day, professor pan jianwei, an academician of the chinese academy of sciences and director of the institute of quantum information and quantum science and technology innovation of the chinese academy of sciences, exclusively told china business news that in the field of quantum communications, it is expected that quantum relays will be used in the near future. and achieved key technological breakthroughs in quantum constellations.

pan jianwei said that the chinese team is researching quantum relay technology that can support quantum communication over thousands of kilometers. it is expected to realize long-distance intercity optical fiber quantum transmission in the next 5-6 years, touching every corner of reality and realizing quantum communication. large-scale network coverage.

in addition, the chinese team is also studying quantum constellations. pan jianwei predicts that by next year, china will launch two to three low-orbit satellites, which will form a constellation with the 10,000-kilometer high-orbit quantum satellite launched in 2027, and will be combined with fiber-based quantum communication networks to provide global quantum network services. "this is expected to be realized in the next 5 to 10 years, and we will provide something really practical." pan jianwei said.

quantum communication users in china are growing rapidly, he added. china telecom, china's largest telecommunications company, had 3 million quantum communication end users as of the end of last year, and this number is expected to exceed 5 million this year.

according to shanghai telecom, the first domestic carrier-grade commercial quantum key distribution network has been built in the shanghai area, which can support a user capacity of no less than 1 million. it is expected that by the end of this year, china telecom will deploy quantum metropolitan area networks in 10-15 cities across the country. in the future, it will gradually be connected with the backbone network. together with the mozi quantum communication satellite in the sky, it will eventually form a quantum communication network integrating heaven and earth.

the rapid development of quantum information technology marks the rise of the second quantum revolution. professor nicolas gisin, who won the 2023 micius quantum prize, is one of the first scientists to commercialize quantum technology in the field of communications, and has made contributions in the fields of experimental quantum cryptography and standard telecommunications optical fiber long-distance quantum communications.

"nicolas gisin was not only a giant among the early experimenters of quantum cryptography, he also broke many other barriers during his illustrious career and founded the first truly successful quantum commercialization company." canadian quantum scientist gilles brassard as a member of the international expert jury, he commented.

as the new chairman of the swiss quantum committee, gisin has pushed switzerland to be at the forefront of international quantum communication technology over the past few decades. the quantum technology company id quantique he founded was the first to commercialize quantum encryption technology. now the company is working with south korea's sk to provide chips equipped with random number generators for samsung smartphones.

gisin told china business news that id quantique’s commercial footprint has spread across europe and asia. for example, quantum network trusted nodes of 1,700 kilometers and 800 kilometers have been implemented in poland and south korea respectively, and the first purely commercial quantum communication key distribution network has been established in singapore in cooperation with singtel.

in gisin's view, the progress of quantum technology is inseparable from the cooperation and exchange of scientists around the world. "many countries now regard quantum technology as a priority, whether it is china, the united states or switzerland." he told china business news, "we also look forward to cooperating with the chinese quantum team led by pan jianwei in more scientific fields in the future. ”

pan jianwei said: "china is very open to international cooperation in the quantum field and is willing to conduct more international exchanges. we hope that after we launch more quantum satellites, we can have more discussions on how to reasonably build quantum constellations and use quantum technology to benefit all mankind.”

professor john rarity, who won the award this time, told china business news: "although there will inevitably be some competition among scientists, this competition is friendly competition. by sharing solutions to technical problems, we have made progress in science and technology. faster progress."

but he also said that while scientific exchanges promote technological progress, they will also encounter obstacles at the commercial level. "specific business concerns can also hinder this kind of cooperation. once the technology is commercialized, people may no longer be willing to share the technology freely." rarity said, "this is also an aspect that affects international cooperation."