Frequency Ratio of ${}^{199}$Hg and ${}^{87}$Sr Optical Lattice Clocks beyond the SI Limit
| Autor: | Yamanaka, Kazuhiro, Ohmae, Noriaki, Ushijima, Ichiro, Takamoto, Masao, Katori, Hidetoshi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We report on a frequency ratio measurement of a ${}^{199}$Hg-based optical lattice clock referencing a ${}^{87}$Sr-based clock. Evaluations of lattice light shift, including atomic-motion-dependent shift, enable us to achieve a total systematic uncertainty of $7.2 \times 10^{-17}$ for the Hg clock. The frequency ratio is measured to be $\nu_{\rm Hg}/\nu_{\rm Sr}=2.629\, 314\, 209\, 898\, 909\, 60(22)$ with a fractional uncertainty of $8.4 \times 10^{-17}$, which is smaller than the uncertainty of the realization of the SI second, i.e., the SI limit. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|