Sr+ single-ion clock

8th Symposium on Frequency Standards and Metrology 2015

Dubé, P.^1 ; Madej, A.A.^1,2 ; Jian, B.^1,2

National Research Council Canada, Ottawa

ON

K1A 0R6, Canada^1

Department of Physics and Astronomy, York University, Toronto

ON

M3J 1P3, Canada^2

关键词: Blackbody radiation shift;    Electric quadrupoles;    Frequency shift;    Optical clocks;    Orders of magnitude;    Single-ion clock;    Sources of uncertainty;    Total uncertainties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012018/pdf
DOI  :  10.1088/1742-6596/723/1/012018

来源: IOP

【 摘 要 】

The evaluated uncertainty of the88Sr+ion optical clock has decreased by several orders of magnitude during the last 15 years, currently reaching a level of 1.2 x 10-17. In this paper, we review the methods developed to control very effectively the largest frequency shifts that once were the main sources of uncertainty for the88Sr+single-ion clock. These shifts are the micromotion shifts, the electric quadrupole shift and the blackbody radiation shift. With further improvements to the evaluation of the systematic shifts, especially the blackbody radiation shift, it is expected that the total uncertainty of the single-ion clock transition frequency will reach the low 10-18level in the near future.