Experimental realization of an optical second with strontium lattice clocks

被引：210

作者：

Le Targat, R. ^{[1
]}

Lorini, L. ^{[1
,2
]}

Le Coq, Y. ^{[1
]}

Zawada, M. ^{[1
,3
]}

Guena, J. ^{[1
]}

Abgrall, M. ^{[1
]}

Gurov, M. ^{[1
]}

Rosenbusch, P. ^{[1
]}

Rovera, D. G. ^{[1
]}

Nagorny, B. ^{[1
,3
]}

Gartman, R. ^{[1
,3
]}

Westergaard, P. G. ^{[1
]}

Tobar, M. E. ^{[4
]}

Lours, M. ^{[1
]}

Santarelli, G. ^{[1
]}

Clairon, A. ^{[1
]}

Bize, S. ^{[1
]}

Laurent, P. ^{[1
]}

Lemonde, P. ^{[1
]}

Lodewyck, J. ^{[1
]}

机构：

[1] Observ Paris, UPMC, CNRS, LNE SYRTE, F-75014 Paris, France

[2] Ist Nazl Ric Metrol, I-10135 Turin, Italy

[3] Nicholas Copernicus Univ, Inst Phys, PL-87100 Torun, Poland

[4] Univ Western Australia, Sch Phys M013, Crawley, WA 6009, Australia

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

关键词：

NOBEL LECTURE; X 10(-16); FREQUENCY; METROLOGY; CESIUM; SHIFT;

D O I：

10.1038/ncomms3109

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Progress in realizing the SI second had multiple technological impacts and enabled further constraint of theoretical models in fundamental physics. Caesium microwave fountains, realizing best the second according to its current definition with a relative uncertainty of 2-4 x 10(-16), have already been overtaken by atomic clocks referenced to an optical transition, which are both more stable and more accurate. Here we present an important step in the direction of a possible new definition of the second. Our system of five clocks connects with an unprecedented consistency the optical and the microwave worlds. For the first time, two state-of-the-art strontium optical lattice clocks are proven to agree within their accuracy budget, with a total uncertainty of 1.5 x 10(-16). Their comparison with three independent caesium fountains shows a degree of accuracy now only limited by the best realizations of the microwave-defined second, at the level of 3.1 x 10(-16).

引用

页数：8

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