Chinese scientists have successfully developed the "Zu chong-2" by 6 orders of magnitude higher than the "plane tree"

Hefei, October 26 (Reporter Wu Lan) Reporter learned from the University of Science and Technology of China on the 26th that the research team composed of Pan Jianwei, Zhu Xiaobo, Peng Chengzhi and others of the university cooperated with the Shanghai Institute of Technical Physics of the Chinese Academy of Sciences to successfully develop the "Zuchong No. 2". It is reported that the computational complexity of "Zuchong-2" is 6 orders of magnitude higher than the 53-bit superconducting quantum computing prototype "Planewood" publicly reported by Google.

According to the existing theory, the quantum random line sampling problem handled by Zu chong no. 2 is 7 orders of magnitude faster than the fastest supercomputer at present, and the computational complexity is 6 orders of magnitude higher than the 53-bit superconducting quantum computing prototype "planewood" publicly reported by Google ("planewood" processes the "quantum random line sampling" problem 2 orders of magnitude faster than classical supercomputing).

According to reports, this achievement is the first time that China has reached the milestone of "quantum computing superiority" in the superconducting qubit system after the "nine chapters" of the optical quantum computing prototype, making China the only country that has reached this milestone in both physical systems at the same time.

The solution of a specific problem by a quantum computer surpasses that of a supercomputer, that is, the superiority of quantum computing, and is the first milestone in the development of quantum computing, reaching this milestone requires coherent manipulation of more than 50 qubits. Superconducting qubits are internationally recognized as one of the physical systems that promise to enable scalable quantum computing.

Pan Jianwei and others have long aimed at the field of superconducting quantum computing, and in May 2021, they built the prototype "Zu Chong Zhi", which was the 62-bit superconducting quantum computing prototype with the largest number of qubits in the world at that time, and realized programmable two-dimensional quantum walking.

On the basis of "Zu Chong No.", the researchers adopted a new flip-down welding 3D packaging process to solve the problem of large-scale bit integration, and successfully developed "Zu Chong No. 2", realizing the high-density integration of 66 data bits, 110 coupling bits, and 11 reads. Zuchong No.2 adopts an adjustable coupling architecture to achieve fast and accurate adjustment of the coupling intensity between bits, which significantly improves the fidelity of parallel quantum gate operation. Through quantum programming, the researchers achieved sampling of quantum random lines, demonstrating the programming ability of Zuchong-2 to execute arbitrary quantum algorithms.

According to reports, the parallel high-fidelity metric subgate control ability and full programmability of "Zuchong No. 2" are expected to find practical applications in specific fields, and the expected applications include quantum machine learning, quantum chemistry, quantum approximation optimization, etc.

Source: China News Network