Set a record! Processing complex samples in Chapter Nine is billions of times faster than supercomputing

Tech 2023-10-12 15:04:15 Source: Network

Recently, the research team composed of Pan Jianwei, Lu Chaoyang and Liu Naile from the Institute of Quantum Information and Quantum Technology Innovation of the Chinese Academy of Sciences, University of Science and Technology of China, cooperated with the Chinese Academy of Sciences Shanghai Institute of Microsystems and Information Technology and the National Research Center for Parallel Computer Engineering Technology, and successfully built a 255 photon quantum computing prototype "Chapter Nine and Three", It has once again set a world record for the technological level of quantum information and the superiority of quantum computing.Researchers have designed a new method for photon detection based on spatiotemporal demultiplexing, constructing high fidelity quasi photon number distinguishable detectors, and improving the level of photon manipulation and quantum computing complexity

Recently, the research team composed of Pan Jianwei, Lu Chaoyang and Liu Naile from the Institute of Quantum Information and Quantum Technology Innovation of the Chinese Academy of Sciences, University of Science and Technology of China, cooperated with the Chinese Academy of Sciences Shanghai Institute of Microsystems and Information Technology and the National Research Center for Parallel Computer Engineering Technology, and successfully built a 255 photon quantum computing prototype "Chapter Nine and Three", It has once again set a world record for the technological level of quantum information and the superiority of quantum computing.

Researchers have designed a new method for photon detection based on spatiotemporal demultiplexing, constructing high fidelity quasi photon number distinguishable detectors, and improving the level of photon manipulation and quantum computing complexity. According to the officially published optimal classical precise sampling algorithm, the processing speed of Gaussian Bose sampling in "Jiuzhang No. 3" is one million times faster than the previous generation "Jiuzhang No. 2". The highest complexity sample processed by 'Nine Chapters Three' in a millionth of a second requires the current strongest supercomputer 'Frontier' to spend over 20 billion years. This achievement further consolidates China's international leading position in the field of quantum computing.

Schematic diagram of experimental equipment

Quantum computing is a new computing paradigm in the post Moore era, which has ultra fast parallel computing capabilities in principle and is expected to achieve exponential acceleration compared to classical computers in some issues of significant social and economic value through specific quantum algorithms. Therefore, developing quantum computers is one of the biggest challenges at the forefront of current world technology.

To this end, the international academic community has formulated a three-step development path. Among them, the first step is to achieve "quantum computing superiority", that is, by high-precision quantum regulation of nearly a hundred quantum bits, to demonstrate the unparalleled computing power of supercomputers in solving specific problems. Meanwhile, in this process, scalable quantum control technologies have been developed, providing a technical foundation for the development of general-purpose quantum computers with fault tolerance capabilities.

In 2020, a team from the University of Science and Technology of China successfully constructed a 76 photon "Nine Chapters" quantum computing prototype, achieving the "quantum computing superiority" of optical systems for the first time internationally, and overcoming the loophole in the Google experiment where quantum superiority depends on sample size. In 2021, the Chinese University of Science and Technology team further successfully developed a 113 photon phase programmable "Jiuzhang 2" and a 56 bit "Zuchongzhi 2" quantum computing prototype, making China the only country to achieve "quantum computing superiority" in both optical and superconducting technology routes.

The International Competitive Situation of Light Quantum Computing

Through a series of innovations, the team at the University of Science and Technology of China has achieved the ability to manipulate 255 photons for the first time, greatly improving the complexity of quantum calculations and processing Gaussian boson sampling at a speed one million times faster than that of "Chapter Nine Two". On the basis of constructing the "Nine Chapters" series of quantum computing prototypes, the research team also revealed the mathematical connection between Gaussian Bose sampling and graph theory, completing the solution of two practical types of graph theory problems such as dense subgraphs, which is 180 million times faster than the speed of accurate simulation by classical computers. In addition, it demonstrated the advantages of unconditional multiphoton quantum precision measurement for the first time internationally.

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