“Tianhe II” Calculates Quantum supremacy Standard

Google recently announced quantum supremacy in a paper published in the journal Nature. Reporters learned on the 4th, the first in the international open the standard research, national defense university computer school Wu Junjie led by the QUANTA team, joint information engineering university and other domestic and foreign scientific research institutions, proposed a new algorithm for quantum computing simulation. The algorithm is at an international level of testing performance on the Tianhe-2 supercomputer, and Google’s work cites a pre-printed paper of the results. On the 4th local time, the international authoritative journal “Physical Review Letter” officially published the results online.


Quantum hegemony, representing quantum computing devices in a specific test case to show the computing ability beyond all classical computers, the realization of quantum supremacy is an important milestone in the development of quantum computing. To evaluate the standard of dominance, it is necessary to use a quantum computing simulator that runs efficiently and in the classical computer. In the post-quantum hegemonic era, this simulator will also become an important tool to accelerate the scientific study of quantum computing.

The paper’s author, Doctoral Student Liu Wei, said that the actual difficulty of quantum computing simulation does not depend entirely on the number of qubits or the number of quantum gates, but on the complexity of the quantum state in the process of computing – quantum entanglement. The study proposed an analog algorithm that relies on quantum entanglement, developed a universal quantum line simulator, and completed a quantum supremacy test case on the Tianhe-2 supercomputer, a simulation of the random quantum line sampling problem, which actually tested 49, 64, 81, 100 and other different numbers of qubits in different quantum line depth of the problem examples, computing performance reached the international leading level.

Liu pointed out that the realization of quantum supremacy is not the end of quantum computing research, but the starting point of the development of quantum computing. In addition to continuing to improve the performance of quantum computing physics systems, quantum algorithms and quantum error correction in noise systems will become the focus of the next stage of quantum computing.

It is reported that the research has been the Great Wall of China Quantum Laboratory, the National Supercomputing Guangzhou Center, the National Natural Science Foundation and other units of support.

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