| Autor: |
Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Christopher W. Oates, Z. W. Barber, Andrew D. Ludlow, Scott A. Diddams, Yanyi Jiang, Nathan D. Lemke, Tara M. Fortier |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Physical review letters. 103(6) |
| ISSN: |
0031-9007 |
| Popis: |
We experimentally investigate an optical clock based on {sup 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 3.4x10{sup -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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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