Spin- 1 / 2 Optical Lattice Clock
2009; American Physical Society; Volume: 103; Issue: 6 Linguagem: Inglês
10.1103/physrevlett.103.063001
ISSN1092-0145
AutoresN. Lemke, Andrew D. Ludlow, Zeb W. Barber, Tara M. Fortier, Scott A. Diddams, Yina Jiang, Steven R. Jefferts, Thomas P. Heavner, T.E. Parker, C. W. Oates,
Tópico(s)Advanced Fiber Laser Technologies
ResumoWe 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 x 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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