Details
| Original language | English |
|---|---|
| Article number | 12443 |
| Journal | Nature Communications |
| Volume | 7 |
| Publication status | Published - 9 Aug 2016 |
Abstract
Leveraging the unrivalled performance of optical clocks as key tools for geo-science, for astronomy and for fundamental physics beyond the standard model requires comparing the frequency of distant optical clocks faithfully. Here, we report on the comparison and agreement of two strontium optical clocks at an uncertainty of 5 × 10 '17 via a newly established phase-coherent frequency link connecting Paris and Braunschweig using 1,415 km of telecom fibre. The remote comparison is limited only by the instability and uncertainty of the strontium lattice clocks themselves, with negligible contributions from the optical frequency transfer. A fractional precision of 3 × 10 '17 is reached after only 1,000 s averaging time, which is already 10 times better and more than four orders of magnitude faster than any previous long-distance clock comparison. The capability of performing high resolution international clock comparisons paves the way for a redefinition of the unit of time and an all-optical dissemination of the SI-second.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- General Biochemistry,Genetics and Molecular Biology
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Nature Communications, Vol. 7, 12443, 09.08.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A clock network for geodesy and fundamental science
AU - Lisdat, C.
AU - Grosche, G.
AU - Quintin, N.
AU - Shi, C.
AU - Raupach, S. M.F.
AU - Grebing, C.
AU - Nicolodi, D.
AU - Stefani, F.
AU - Al-Masoudi, A.
AU - Dörscher, S.
AU - Häfner, S.
AU - Robyr, J. L.
AU - Chiodo, N.
AU - Bilicki, S.
AU - Bookjans, E.
AU - Koczwara, A.
AU - Koke, S.
AU - Kuhl, A.
AU - Wiotte, F.
AU - Meynadier, F.
AU - Camisard, E.
AU - Abgrall, M.
AU - Lours, M.
AU - Legero, T.
AU - Schnatz, H.
AU - Sterr, U.
AU - Denker, H.
AU - Chardonnet, C.
AU - Le Coq, Y.
AU - Santarelli, G.
AU - Amy-Klein, A.
AU - Le Targat, R.
AU - Lodewyck, J.
AU - Lopez, O.
AU - Pottie, P. E.
N1 - Funding Information: We would like to thank T. Bono and L. Gyde for their support and for facilitating the access to the RENATER network and facilities, P. Gris and B. Moya for helping us to establish the cross-border link between Kehl and Strasbourg and for hosting the experiment at the IT centre of Uni. Strasbourg, as well as O. Bier from ARTE for support at Kehl and C. Grimm from Deutsches Forschungsnetz (DFN) and W.-Ch. Konig (Gasline GmbH) for support at the German link. We thank L. Timmen and C. Voigt from the Institut fur Erdmessung, Leibniz Universitat Hannover and P. Delva from SYRTE for supporting the geo-potential determination. We acknowledge funding support from the Agence Nationale de la Recherche (ANR blanc LIOM 2011-BS04-009-01, Labex First-TF ANR-10-LABX-48-01, Equipex REFIMEVE ANR-11-EQPX-0039), the European Metrology Research Programme (contract SIB-02 NEAT-FT and SIB-55 ITOC), Centre National dE tudes Spatiales (CNES), Conseil Regional Ile-de-France (DIM NanoK), CNRS with Action Specifique Gravitation, References, Astronomie, Metrologie (GRAM) and the German Copyright: Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/8/9
Y1 - 2016/8/9
N2 - Leveraging the unrivalled performance of optical clocks as key tools for geo-science, for astronomy and for fundamental physics beyond the standard model requires comparing the frequency of distant optical clocks faithfully. Here, we report on the comparison and agreement of two strontium optical clocks at an uncertainty of 5 × 10 '17 via a newly established phase-coherent frequency link connecting Paris and Braunschweig using 1,415 km of telecom fibre. The remote comparison is limited only by the instability and uncertainty of the strontium lattice clocks themselves, with negligible contributions from the optical frequency transfer. A fractional precision of 3 × 10 '17 is reached after only 1,000 s averaging time, which is already 10 times better and more than four orders of magnitude faster than any previous long-distance clock comparison. The capability of performing high resolution international clock comparisons paves the way for a redefinition of the unit of time and an all-optical dissemination of the SI-second.
AB - Leveraging the unrivalled performance of optical clocks as key tools for geo-science, for astronomy and for fundamental physics beyond the standard model requires comparing the frequency of distant optical clocks faithfully. Here, we report on the comparison and agreement of two strontium optical clocks at an uncertainty of 5 × 10 '17 via a newly established phase-coherent frequency link connecting Paris and Braunschweig using 1,415 km of telecom fibre. The remote comparison is limited only by the instability and uncertainty of the strontium lattice clocks themselves, with negligible contributions from the optical frequency transfer. A fractional precision of 3 × 10 '17 is reached after only 1,000 s averaging time, which is already 10 times better and more than four orders of magnitude faster than any previous long-distance clock comparison. The capability of performing high resolution international clock comparisons paves the way for a redefinition of the unit of time and an all-optical dissemination of the SI-second.
UR - http://www.scopus.com/inward/record.url?scp=84982136499&partnerID=8YFLogxK
U2 - 10.1038/ncomms12443
DO - 10.1038/ncomms12443
M3 - Article
AN - SCOPUS:84982136499
VL - 7
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 12443
ER -