Spin-1/2 Optical Lattice Clock

Details Spin-1/2 Optical Lattice Clock Spin-1/2 Optical Lattice Clock

2009-06-05

arxiv.org/abs/0906.1219v2

Physics

Atomic Physics

4 pages, 2 figures, accepted to PRL

Scientific paper

We experimentally investigate an optical clock based on $^{171}$Yb ($I=1/2$) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including a density-dependent collision shift, with a fractional uncertainty of $3.4 \times 10^{-16}$, limited principally by uncertainty in the blackbody radiation Stark shift. We measured the absolute clock transition frequency relative to the NIST-F1 Cs fountain clock and find the frequency to be 518 295 836 590 865.2(0.7) Hz.

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