Frequency ratio measurements at 18-digit accuracy using an optical clock network

被引:278
作者
Beloy, Kyle [1 ]
Bodine, Martha I. [1 ]
Bothwell, Tobias [2 ]
Brewer, Samuel M. [1 ,5 ]
Bromley, Sarah L. [2 ,6 ]
Chen, Jwo-Sy [1 ,3 ,7 ]
Deschenes, Jean-Daniel [4 ]
Diddams, Scott A. [1 ,3 ]
Fasano, Robert J. [1 ,3 ]
Fortier, Tara M. [1 ]
Hassan, Youssef S. [1 ,3 ]
Hume, David B. [1 ]
Kedar, Dhruv [2 ]
Kennedy, Colin J. [1 ,2 ]
Khader, Isaac [1 ]
Koepke, Amanda [1 ]
Leibrandt, David R. [1 ,3 ]
Leopardi, Holly [1 ,3 ,8 ]
Ludlow, Andrew D. [1 ]
McGrew, William F. [1 ,3 ]
Milner, William R. [2 ]
Newbury, Nathan R. [1 ]
Nicolodi, Daniele [1 ,3 ]
Oelker, Eric [1 ,3 ]
Parker, Thomas E. [1 ]
Robinson, John M. [2 ]
Romisch, Stefania [1 ,9 ]
Schaffer, Stefan A. [1 ,10 ]
Sherman, Jeffrey A. [1 ]
Sinclair, Laura C. [1 ]
Sonderhouse, Lindsay [2 ]
Swann, William C. [1 ]
Yao, Jian [1 ]
Ye, Jun [1 ,2 ,3 ]
Zhang, Xiaogang [1 ,3 ]
机构
[1] Natl Inst Stand & Technol, 325 Broadway, Boulder, CO 80305 USA
[2] Univ Colorado, JILA, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[4] Consultat OctoSig Inc, Quebec City, PQ, Canada
[5] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
[6] Univ Durham, Dept Phys, Durham, England
[7] IonQ Inc, College Pk, MD USA
[8] Space Dynam Lab, North Logan, UT 84341 USA
[9] Northrup Grumman Miss Syst, Woodland Hills, CA USA
[10] Univ Amsterdam, Waals Zeeman Inst, van der Waals Zeeman Inst, Amsterdam, Netherlands
基金
美国国家科学基金会;
关键词
D O I
10.1038/s41586-021-03253-4
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
Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics(1). Clocks operating at optical frequencies have now demonstrated fractional stability and reproducibility at the 10(-18) level, two orders of magnitude beyond their microwave predecessors(2). Frequency ratio measurements between optical clocks are the basis for many of the applications that take advantage of this remarkable precision. However, the highest reported accuracy for frequency ratio measurements has remained largely unchanged for more than a decade(3-5). Here we operate a network of optical clocks based on Al-27(+) (ref.(6)), Sr-87 (ref.(7)) and Yb-171 (ref.(8)), and measure their frequency ratios with fractional uncertainties at or below 8 x 10(-18). Exploiting this precision, we derive improved constraints on the potential coupling of ultralight bosonic dark matter to standard model fields(9,10). Our optical clock network utilizes not just optical fibre(11), but also a 1.5-kilometre free-space link(12,13). This advance in frequency ratio measurements lays the groundwork for future networks of mobile, airborne and remote optical clocks that will be used to test physical laws(1), perform relativistic geodesy(14) and substantially improve international timekeeping(15).
引用
收藏
页码:564 / +
页数:16
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