Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publication Citation: A Spin-1/2 Optical Lattice Clock

NIST Authors in Bold

Author(s): Nathan D. Lemke; Andrew D. Ludlow; Zeb Barber; Tara M. Fortier; Scott A. Diddams; Yanyi Jiang; Steven R. Jefferts; Thomas P. Heavner; Thomas E. Parker; Christopher W. Oates;
Title: A Spin-1/2 Optical Lattice Clock
Published: August 07, 2009
Abstract: We experimentally investigate an optical clock based on 171Yb (I = 1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including the density-dependent collision shift, with an uncertainty of 0.19 Hz, or 3.6× 10−16 fractionally, limited principally by uncertainty in the blackbody radiation Stark shift. We have measured the absolute clock transition frequency relative to the NIST-F1 Cs fountain clock and find the frequency to be 518 295 836 590 865.7(0.9) Hz.
Citation: Physical Review Letters
Volume: 103
Pages: 4 pp.
Keywords: lasers,other standards,spectroscopy
Research Areas: Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (263KB)