(Zhongguancun Forum) Long-life superconducting qubit chip breaks the 500 microsecond mark and breaks the world record
China News Service, Beijing, September 25 (Chen Hang Xu Jing) At the 2021 Zhongguancun Forum plenary meeting held on the 25th, Yu Haifeng, a researcher at the Beijing Institute of Quantum Information Science, released a long-life superconducting qubit chip. This result enables the decoherence time of the qubit to reach 503 microseconds, setting a new world record.
In the field of quantum physics, maintaining good quantum coherence is essential. It determines a series of core performance issues of quantum computers, such as the fidelity of quantum gate manipulation and the depth of quantum circuits. Extending the coherence time of qubits has always been the focus of technology competitions in various countries. In the past ten years, the coherence time of qubits has increased by nearly 5 orders of magnitude.
The research team of Beijing Institute of Quantum Information Science Yu Haifeng conducted in-depth explorations on the performance of superconducting qubits, and continuously optimized the material growth and micro-processing preparation process. In early May of this year, the decoherence time of the qubits reached 503 microseconds, breaking 2020 The world record of 360 microseconds held by the research team of Princeton University in the United States in March 2003.
It is reported that the research results are expected to observe quantum processes or phenomena that could not be observed before, and lay a solid device foundation for the practical application of superconducting quantum computing.
At the ongoing Zhongguancun Forum, a number of results covering core technology research and major industry standards were released. Among them is the non-liquid helium dilution refrigerator released by Ji Zhongqing, an associate researcher of the Institute of Physics of the Chinese Academy of Sciences. Its core indicators have reached the international mainstream product level and achieved a continuous and stable operating temperature 0.01 degrees higher than absolute zero.
Dilution refrigerators are currently necessary low-temperature experimental equipment for the research of superconducting quantum computing, topological quantum computing and other internationally highly competitive quantum information technology research. Mastering the core technology of dilution refrigeration has provided China with the ability to provide extremely low temperature conditions for cutting-edge research such as quantum computing.
The Institute of Physics of the Chinese Academy of Sciences is the birthplace of China’s low-temperature experimental technology and low-temperature physics research. In the 1970s, China’s first wet dilution refrigerator was successfully developed, achieving an extremely low temperature of 33mK (0.033 degrees above absolute zero).
The “New Generation of Artificial Intelligence Ethics Code” was also released at the Zhongguancun Forum plenary meeting held on the 25th. This code takes into account the current ethical concerns about privacy, prejudice, discrimination, and fairness, and proposes six basic ethical requirements and four specific ethical norms for artificial intelligence management, research and development, supply, use and other activities, aiming to integrate ethics into artificial intelligence. The whole life cycle of intelligence provides ethical guidelines for natural persons, legal persons, and other related institutions engaged in artificial intelligence-related activities. (over)
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