中国物理B ›› 2024, Vol. 33 ›› Issue (7): 70701-070701.doi: 10.1088/1674-1056/ad3b87

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Development of 400-μW cryogen-free dilution refrigerators for quantum experiments

Xiang Guan(关翔)1, Jie Fan(樊洁)1, Yong-Bo Bian(边勇波)1, Zhi-Gang Cheng(程智刚)1,2, and Zhong-Qing Ji(姬忠庆)1,†   

  1. 1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2024-02-05 修回日期:2024-03-16 接受日期:2024-04-07 出版日期:2024-06-18 发布日期:2024-06-18
  • 通讯作者: Zhong-Qing Ji E-mail:zji@iphy.ac.cn
  • 基金资助:
    This work was supported by the Beijing Commission of Science and Technology (Grant No. Z211100004021012) and Special Research Assistant Program of the Chinese Academy of Sciences (Grant No. E3VP021RX4).

Development of 400-μW cryogen-free dilution refrigerators for quantum experiments

Xiang Guan(关翔)1, Jie Fan(樊洁)1, Yong-Bo Bian(边勇波)1, Zhi-Gang Cheng(程智刚)1,2, and Zhong-Qing Ji(姬忠庆)1,†   

  1. 1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2024-02-05 Revised:2024-03-16 Accepted:2024-04-07 Online:2024-06-18 Published:2024-06-18
  • Contact: Zhong-Qing Ji E-mail:zji@iphy.ac.cn
  • Supported by:
    This work was supported by the Beijing Commission of Science and Technology (Grant No. Z211100004021012) and Special Research Assistant Program of the Chinese Academy of Sciences (Grant No. E3VP021RX4).

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摘要： We have successfully developed cryogen-free dilution refrigerators with medium cooling power that can be applied to quantum experiments. Breakthroughs have been made in some key technologies and components of heat switches and dilution units. Our prototype has been running continuously and stably for more than 100 hours below 10 mK, with a minimum temperature of 7.6 mK and a cooling power of 450 μW at 100 mK. At the same time, we have also made progress in the application of dilution refrigerators, such as quantum computing, low-temperature detector, and magnet integration. These indicators and test results indicate good prospects for application in physics, astronomy, and quantum information.

关键词: cryogen-free dilution refrigerator, quantum computing, low-temperature detector, superconducting magnet

Abstract: We have successfully developed cryogen-free dilution refrigerators with medium cooling power that can be applied to quantum experiments. Breakthroughs have been made in some key technologies and components of heat switches and dilution units. Our prototype has been running continuously and stably for more than 100 hours below 10 mK, with a minimum temperature of 7.6 mK and a cooling power of 450 μW at 100 mK. At the same time, we have also made progress in the application of dilution refrigerators, such as quantum computing, low-temperature detector, and magnet integration. These indicators and test results indicate good prospects for application in physics, astronomy, and quantum information.

Key words: cryogen-free dilution refrigerator, quantum computing, low-temperature detector, superconducting magnet

中图分类号:  (Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)

  • 07.20.Mc
67.25.-k (4He) 67.30.-n (3He) 67.60.-g (Mixtures of 3He and 4He)