Improved Frequency Measurement of a One-Dimensional Optical Lattice Clock with a Spin-Polarized Fermionic87Sr Isotope
- 15 October 2006
- journal article
- research article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 75 (10)
- https://doi.org/10.1143/jpsj.75.104302
Abstract
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 1 S 0 ( F =9/2)– 3 P 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.Keywords
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