| Author(s): |
Lemke, N. D.; Ludlow, A. D.; Barber, Z.; Fortier, T. M.; Diddams, S. A.; Jiang, Y.; Jefferts, S. R.; Heavner, T. P.; Parker, T. E.; Oates, C. W.; |
| 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 (263 K) |
