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Summary & Details

Roadmap toward the Redefi nition of the SI Second with Optical Lattice Clocks

見えてきた光格子時計による秒の再定義への道筋

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Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20214968

Paper/Info type: Journal of Society of Automotive Engineers of Japan

Vol.75 No.12

Pages: 86-91(Total 6 p)

Date of publication: Dec 2021

Publisher: JSAE

Language: Japanese

Detailed Information

Category(J)	ホットトピックス Translation
Category(E)	Hot Topics
Author(J)	1) 井戸哲也
Author(E)	1) Tetsuya Ido
Affiliation(J)	1) 情報通信研究機構
Abstract(J)	広く計測技術を支える標準量の中で最も重要な標準の一つである周波数標準については、従来のセシウム原子のマイクロ波遷移による定義から光格子時計に代表される光学遷移による定義への変更が議論されている。再定義に至るために満たすべき条件とそれに対しての進捗の状況、また再定義の想定される時期について概説する。 Translation
Abstract(E)	The frequency standard, which is one of the most important standards that support a wide range of measurement technologies, has been discussed to be redefined from the conventional definition based on the microwave transition of cesium atoms, to the definition based on the optical transition as represented by optical lattice clocks. The conditions to be satisfied for the redefinition, the progress toward it, and the expected timing of the redefinition are outlined.

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