Improved Frequency Measurement of a One-Dimensional Optical Lattice Clock with a Spin-Polarized Fermionic87Sr Isotope

Masao Takamoto, Feng-Lei Hong, Ryoichi Higashi, Yasuhisa Fujii, Michito Imae, Hidetoshi Katori
2006 Journal of the Physical Society of Japan  
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
more » ... 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.
doi:10.1143/jpsj.75.104302 fatcat:guusf3s6wfghhe5h52afft55pa