Science advances · 2026
In-orbit test of the weak equivalence principle with atom interferometry.
СтатьяНазвание и аннотация: Перевод в очереди
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Zhang Dan-Fang, Li Jing-Ting, Wang Wen-Zhang, Xu Wei-Hao, Wei Jia-Yi, Li Xiao, Wang Yi-Bo, Gao Dong-Feng, Zhong Jia-Qi, Tang Biao, Zhou Lin, Li Run-Bing, Sun Huan-Yao, Chen Qun-Feng, Qin Lei, An Mei-Zhen, Li Zong-Feng, Wang Shu-Quan, Guo Xiao-Xiao, Tian Yao, Yu Xi-He, Zhong Hong-En, Chen Xi, Wang Jin, Zhan Ming-Sheng
Аннотация
The weak equivalence principle (WEP) is a central pillar of general relativity. Its precise test with quantum systems in space offers a unique window onto new physics. Here, we report an in-orbit quantum test of the WEP. A dual-species (85Rb/87Rb) atom interferometer is realized aboard the China Space Station. Methods of platform motion suppression, fluorescence detection switching, and two-photon detuning switching are developed to eliminate phase noise and improve measurement accuracy. A test uncertainty of 2.8 × 10-8 is obtained from 280 days of WEP test data, and a test result of (-2.7 ± 4.7) × 10-7 is achieved after error estimation. This improves prior atom-interferometric WEP tests in microgravity by three orders of magnitude. This work paves the way for space-borne quantum inertial sensors and their application to future fundamental physics in space.