Optical frequency ratio of a 171Yb+ single-ion clock and a 87Sr lattice clock

被引：33

作者：

Doerscher, S. ^{[1
]}

Huntemann, N. ^{[1
]}

Schwarz, R. ^{[1
]}

Lange, R. ^{[1
]}

Benkler, E. ^{[1
]}

Lipphardt, B. ^{[1
]}

Sterr, U. ^{[1
]}

Peik, E. ^{[1
]}

Lisdat, C. ^{[1
]}

机构：

[1] Phys Tech Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany

来源：

METROLOGIA | 2021年 / 58卷 / 01期

基金：

欧盟地平线“2020”;

关键词：

optical clocks; frequency ratio; ytterbium ion clock; strontium lattice clock; YB; SR; HG;

D O I：

10.1088/1681-7575/abc86f

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report direct measurements of the frequency ratio of the 642 THz S-2(1/2)(F=0)-2F(7/2)(F=0)-F-2(7/2)(F = 3) electric octupole transition in Yb-171(+) and the 429 THz S-1(0)-P-3(0) transition in Sr-87. A series of 107 measurements has been performed at the Physikalisch-Technische Bundesanstalt between December 2012 and October 2019. Long-term variations of the ratio are larger than expected from the individual measurement uncertainties of few 10(-17). The cause of these variations remains unknown. Even taking these into account, we find a fractional uncertainty of the frequency ratio of 2.5 x 10(-17), which improves upon previous knowledge by one order of magnitude. The average frequency ratio is nu(Yb)+/nu(Sr) = 1.495 991 618 544 900 537(38). This represents one of the most accurate measurements between two different atomic species to date.

引用

页数：8

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