| 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: |
 Click here to retrieve PDF version of paper (257KB) |
