Improved frequency measurement of a one-dimensional optical lattice clock with a spin-polarized fermionic \(^{87}\)Sr isotope

We demonstrate a one-dimensional optical lattice clock with a spin-polarized fermionic isotope designed to realize a collision-shift-free atomic clock with neutral atom ensembles. To reduce systematic uncertainties, we developed both Zeeman shift and vector light-shift cancellation techniques. By in...

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Bibliographic Details
Published inarXiv.org
Main Authors Takamoto, Masao, Feng-Lei, Hong, Higashi, Ryoichi, Fujii, Yasuhisa, Imae, Michito, Katori, Hidetoshi
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.08.2006
Subjects
Frequency measurement
Frequency standards
Global positioning systems
GPS
Optical frequency
Optical lattices
Satellite navigation systems
Uncertainty
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Summary:We demonstrate a one-dimensional optical lattice clock with a spin-polarized fermionic isotope designed to realize a collision-shift-free atomic clock with neutral atom ensembles. To reduce systematic uncertainties, we developed both Zeeman shift and vector light-shift cancellation techniques. By introducing both an H-maser and a Global Positioning System (GPS) carrier phase link, the absolute frequency of the \(^1S_0(F=9/2) - {}^3P_0(F=9/2)\) clock transition of the \(^{87}\)Sr optical lattice clock is determined as 429,228,004,229,875(4) Hz, where the uncertainty is mainly limited by that of the frequency link. The result indicates that the Sr lattice clock will play an important role in the scope of the redefinition of the ``second'' by optical frequency standards.
ISSN:2331-8422
DOI:10.48550/arxiv.0608212