According to the official website of the University of Science and Technology of China, recently, the University of Science and Technology of China Pan Jianwei and his colleagues Bao Xiaohui, Zhang Qiang, etc., long-lived cold atomic quantum storage technology combined with quantum frequency conversion technology, the use of field optical fiber to establish entanglement between independent quantum storage nodes at a linear distance of 12.5 km.
According to the report, the fiber optic link for the previous successful test of 50 km two-node entanglement is located in the same laboratory, but this time divided into two quantum memories, node A is located in Hefei Innovation Industrial Park, node B is located in the east of China Science University, the two are connected by 20.5 km of optical fiber, successfully achieved the long-distance entanglement between independent memories.
The team generated long-lived light-atom entanglement at Node A and sent the generated single photons to Node B after frequency conversion, and Node B converted the received photons again and used another quantum memory for storage.
The research results were published in Physical Review Letters on July 28 in the form of Editors’ Suggestion and reported by the American Physical Society (APS) website Physics under the title “Distant Memories Entangled “In May of this year, Pan of the University of Science and Technology of China (USTC) published a paper on the subject.
In May, Pan Jianwei and his colleagues Chengzhi Peng, Yuhao Chen, and Juan Yin of the University of Science and Technology of China (USTC) made important experimental progress in long-range quantum state transmission using the Mozi quantum science experiment satellite. The experiment is the first to achieve the long-distance transmission of quantum states between two ground stations 1200 km apart on Earth, an important step toward building a global quantum information processing and quantum communication network.
The University of Science and Technology of China (USTC) also established the Institute of Future Technologies in May, aiming to train a group of world-class technologists who will drive the wave of quantum technology.
