Direct Comparison of Distant Optical Lattice Clocks at the $10^{-16}$ Uncertainty
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概要
- 論文の詳細を見る
Fiber-based remote comparison of 87Sr lattice clocks in 24 km distant laboratories is demonstrated. The instability of the comparison reaches $5\times 10^{-16}$ over an averaging time of 1000 s, which is two orders of magnitude shorter than that of conventional satellite links and is limited by the instabilities of the optical clocks. By correcting the systematic shifts that are predominated by the differential gravitational redshift, the residual fractional difference is found to be $(1.0\pm 7.3)\times 10^{-16}$, confirming the coincidence between the two clocks. The accurate and speedy comparison of distant optical clocks paves the way for a future optical redefinition of the second.
- 2011-08-25
著者
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Li Ying
National Institute Of Information And Communications Technology
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Katori Hidetoshi
Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo
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YAMAGUCHI Atsushi
National Institute of Information and Communications Technology
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KUMAGAI Motohiro
National Institute of Information and Communications Technology
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HACHISU Hidekazu
National Institute of Information and Communications Technology
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IDO Tetsuya
National Institute of Information and Communications Technology
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Fujieda Miho
National Institute Of Information And Communications Technology
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Takano Tetsushi
Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo
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Takamoto Masao
Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo
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Nagano Shigeo
National Inst. Information And Communications Technol. Tokyo Jpn
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Li Ying
National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan
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Fujieda Miho
National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan
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Katori Hidetoshi
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Takano Tetsushi
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Ido Tetsuya
National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan
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Takamoto Masao
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Kumagai Motohiro
National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan
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