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タイトル: Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time
著者: Nemitz, Nils
Ohkubo, Takuya
Takamoto, Masao
Ushijima, Ichiro
Das, Manoj
Ohmae, Noriaki
Katori, Hidetoshi
キーワード: Atomic and molecular physics
Quantum metrology
Optical spectroscopy
発行日: 2016年2月29日
出版者: Nature Publishing Group
掲載誌情報: Nils Nemitz, Takuya Ohkubo, Masao Takamoto, Ichiro Ushijima, Masao Takamoto, Manoj Das, Noriaki Ohmae, and Hidetoshi Katori, "Frequency Ratio of Yb and Sr clocks with 5x10-17 uncertainty at 150 seconds averaging time", Nature Photonics 10, 258 (2016), doi:10.1038/nphoton.2016.20.
関連URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/rapid-comparison-of-optical-lattice-clocks.html
抄録: Transition frequencies of atoms and ions are among the most accurately accessible quantities in nature, playing important roles in pushing the frontiers of science by testing fundamental laws of physics, in addition to a wide range of applications such as satellite navigation systems. Atomic clocks based on optical transitions approach uncertainties of 10−18 (refs 1–3), where full frequency descriptions are far beyond the reach of the SI second. Direct measurements of the frequency ratios of such super clocks, on the other hand, are not subject to this limitation4, 5, 6, 7, 8. They can verify consistency and overall accuracy for an ensemble of super clocks, an essential step towards a redefinition of the second9. Here we report a measurement that finds the frequency ratio of neutral ytterbium and strontium clocks to be ℛ = 1.207507039343337749(55), with a fractional uncertainty of 4.6 × 10−17 and a measurement instability as low as 4 × 10−16 (τ/s)−1/2.
内容記述: UTokyo Research掲載「異なる原子の光格子時計の短時間精密比較に成功」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/rapid-comparison-of-optical-lattice-clocks.html
UTokyo Research "Rapid comparison of optical lattice clocks" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/rapid-comparison-of-optical-lattice-clocks.html
URI: http://hdl.handle.net/2261/60844
ISSN: 1749-4893
出現カテゴリ:014 自然科学
1132610 学術雑誌論文


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