Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 75, Issue 10, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.75.104302
Keywords
atomic clock; spin polarization; fermionic isotope; collision-shift; optical lattice; global positioning system (GPS); carrier phase link; absolute frequency measurement; light shift; redefinition of the second
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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 S-1(0)(F = 9/2)-P-3(0)(F = 9/2) clock transition of the Sr-87 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.
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