Work in China is supported by the National Natural Science Foundation of China (Nos. 51922011, 61888102, and 11974045), the National Key Research & Development Program of China (Nos. 2016YFA0202300, 2018YFA0305800, and 2019YFA0308500), the CAS Pioneer Hundred Talents Program, K. C. Wong Education Foundation, the Strategic Priority Research Program of Chinese Academy of Sciences (No. XDB30000000) and Beijing Institute of Technology Research Fund Program for Young Scholars. A portion of the research was performed in CAS Key Laboratory of Vacuum Physics. Computational resources were provided by the National Supercomputing Center in Tianjin. Work in the USA (S. B. Z.) was supported by U.S. DOE under Grant No. DE-SC0002623.
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