Research on Ultracold Atom Physics in Microgravity

LI Lin; WANG Bin; ZHOU Xiaoji; CHEN Xuzong; LI Tang; LIU Liang

doi:10.11728/cjss2025.01.2024-0174

Volume 45 Issue 1

Mar. 2025

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LI Lin, WANG Bin, ZHOU Xiaoji, CHEN Xuzong, LI Tang, LIU Liang. Research on Ultracold Atom Physics in Microgravity (in Chinese). Chinese Journal of Space Science, 2025, 45(1): 29-55 doi: 10.11728/cjss2025.01.2024-0174

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LI Lin, WANG Bin, ZHOU Xiaoji, CHEN Xuzong, LI Tang, LIU Liang. Research on Ultracold Atom Physics in Microgravity (in Chinese). Chinese Journal of Space Science, 2025, 45(1): 29-55 doi: 10.11728/cjss2025.01.2024-0174

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Research on Ultracold Atom Physics in Microgravity

doi: 10.11728/cjss2025.01.2024-0174 cstr: 32142.14.cjss.2024-0174

LI Lin^1
,,
WANG Bin¹,
ZHOU Xiaoji²,
CHEN Xuzong²,
LI Tang^{1
,
,},
LIU Liang^{1
,
,}

1.
Aerospace Laser Technology and System Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2.
School of Electronics, Peking University, Beijing 100871

Received Date: 2024-11-28
Rev Recd Date: 2025-01-17

Available Online: 2025-01-16

Abstract

Abstract

The China Space Station (CSS) provides an ideal experimental platform for researching and applying ultracold atoms in microgravity. On 31 October 2022, the Cold Atom Physics Research Rack (CAPR) was launched to the CSS together with the Mengtian lab module, designed by the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences (SIOM) and Peking University. The main goal of the CAPR is to build an ultracold atomic physics experiment platform using ⁸⁷Rb Bose Einstein Condensate (BEC) in the CSS. In microgravity, ultracold atoms can be cooled to picokelvin (pK) via Two-Stage Crossed Beams Cooling (TSCBC), which is three orders of magnitude lower than on earth and can inspire the novel physical phenomena. The preparation of the BEC and the deep cooling are introduced in this paper, as well as a series of advancements in ultracold atoms in microgravity. The CAPR is an experimental platform that relies on evaporative cooling in a crossed optical dipole trap. Furthermore, the CAPR’s design scheme and ground verification experiment are also introduced. So far, the CAPR has continued to conduct research on ultracold atoms in microgravity, with more than two years of uninterrupted operation in orbit. Up to now, preliminary experimental results have been achieved, realizing the primary purpose of the CAPR.
- Bose-Einstein condensate,
- Ultracold atom,
- China Space Station (CSS),
- Microgravity

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References(89)

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Research on Ultracold Atom Physics in Microgravity

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