Improved Frequency Measurement of a One-Dimensional Optical Lattice Clock with a Spin-Polarized Fermionic ^<87>Sr Isotope(Atomic and molecular physics)

概要

論文の詳細を見る
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.
社団法人日本物理学会の論文
2006-10-15