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| Precise Measurements of Planck Constant: Histories and Present Situation |
| LI Yu-fen1,HE Sui-rong1,WEI Lian-fu1,2 |
1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
2. School of Science, Donghua University, Shanghai 201620,China |
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Abstract Planck constant plays the central role in quantum theory and quantum effect observations. Its accurate determination is of great significance to establish the physical standard of mass metrology, precisely detect various quantum effects, and also characterize the feature of early big bang universe. Given the precise value of Planck constant was defined in 2019 after more than a hundred years of measurements by various indirect and direct methods, the historical process is reviewed systematically, and the future development of precise measurement of Planck constant is forecasted.
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Received: 01 December 2020
Published: 01 December 2021
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| Fund:National Natural Science Foundation of China |
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2021, Vol. 42 
