Evaluation of trap-induced systematic frequency shifts for a multi-ion optical clock at the 10?19 level

8th Symposium on Frequency Standards and Metrology 2015

Keller, J.^1 ; Burgermeister, T.^1 ; Kalincev, D.^1 ; Kiethe, J.^1 ; Mehlstäubler, T.E.^1

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig

D-38116, Germany^1

关键词: Black body radiation;    Coulomb crystals;    Fractional frequencies;    Frequency shift;    Ion ensembles;    Optical clocks;    Secular motion;    Short term stability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012027/pdf
DOI  :  10.1088/1742-6596/723/1/012027

来源: IOP

【 摘 要 】

In order to improve the short-term stability of trapped-ion optical clocks, we are developing a frequency standard based on115In+/172Yb+Coulomb crystals. For this purpose, we have developed scalable segmented Paul traps which allow a high level of control for multiple ion ensembles. In this article, we detail on our recent results regarding the reduction of the leading sources of frequency uncertainty introduced by the ion trap: 2nd-order Doppler shifts due to micromotion and the heating of secular motion, as well as the black-body radiation shift due to warming of the trap. We show that the fractional frequency uncertainty due to each of these effects can be reduced to well below 10-19.