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

doi:10.1088/1674-1056/ad3b87

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.

Keywords: cryogen-free dilution refrigerator quantum computing low-temperature detector superconducting magnet

Received: 05 February 2024
Revised: 16 March 2024
Accepted manuscript online: 07 April 2024

PACS:	07.20.Mc	(Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)
	67.25.-k	(4He)
	67.30.-n	(3He)
	67.60.-g	(Mixtures of 3He and 4He)

Fund: 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).

Corresponding Authors: Zhong-Qing Ji
E-mail: zji@iphy.ac.cn

Cite this article:

Xiang Guan(关翔), Jie Fan(樊洁), Yong-Bo Bian(边勇波), Zhi-Gang Cheng(程智刚), and Zhong-Qing Ji(姬忠庆) Development of 400-μW cryogen-free dilution refrigerators for quantum experiments 2024 Chin. Phys. B 33 070701

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