Xinhua News Agency: The world's first! China breaks world record

Published：2026-03-14 | Views：119times

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On May 6th, it was learned from the University of Science and Technology of China that Academician Pan Jianwei and colleagues Peng Chengzhi, Chen Yuao, Yin Juan, and others have recently used the "Mozi" quantum science experimental satelliteFor the first time, remote transmission of quantum states between two ground stations located 1200 kilometers apart on Earth has been achieved,Taking an important step towards building a global quantum information processing and quantum communication network.

The use of quantum teleportation to achieve long-distance quantum state transmission is an important way to build a quantum communication network. However, in the implementation process, the distance and quality of quantum entanglement distribution will be affected by factors such as channel loss and decoherence. How to break through the transmission distance limitation has always been one of the core issues in international quantum communication research.

The world's first quantum science experimental satellite "Mozi" launched by China provides a new platform for human exploration of long-distance quantum communication.However, due to the influence of atmospheric turbulence, it is very difficult to achieve quantum state measurement based on quantum interference after photons propagate in the atmospheric channel.

Recently, the Pan Jianwei team innovatively applied optical integrated bonding technology to the field of space quantum communication, achieving an optical interferometer with ultra-high stability that can be stable for a long time without active closed-loop, overcoming the problem of quantum optical interference after long-distance turbulent atmospheric transmission. They combined a quantum teleportation scheme based on two-photon path polarization mixed entangled states to complete remote quantum state transmission verification between Lijiang Station in Yunnan, China and Delingha Ground Station in Qinghai. Six typical quantum states were verified in experiments, and the transmission fidelity exceeded the classical limit.

In 2012, Pan Jianwei's team achieved quantum teleportation over a hundred kilometers in free space for the first time internationally. Ten years later, they successfully achieved a breakthrough,Created a new world record for 1200 kilometers of surface quantum state transmission.

Recently, the internationally authoritative academic journal "Physical Review Letters" published this achievement. The reviewer believes that,This experiment is more challenging than previous ones, overcoming major technical challenges and having significant implications for future quantum communication applications

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