A clock network for geodesy and fundamental science

Medientyp: Sonstige Veröffentlichung; E-Artikel

Titel: A clock network for geodesy and fundamental science

Beteiligte: Lisdat, Christian [Verfasser:in]; Grosche, G. [Verfasser:in]; Quintin, N. [Verfasser:in]; Shi, C. [Verfasser:in]; Raupach, S.M.F. [Verfasser:in]; Grebing, C. [Verfasser:in]; Nicolodi, D. [Verfasser:in]; Stefani, F. [Verfasser:in]; Al-Masoudi, A. [Verfasser:in]; Dörscher, S. [Verfasser:in]; Häfner, Sebastian [Verfasser:in]; Robyr, J.-L. [Verfasser:in]; Chiodo, N. [Verfasser:in]; Bilicki, S. [Verfasser:in]; Bookjans, E. [Verfasser:in]; Koczwara, A. [Verfasser:in]; Koke, S. [Verfasser:in]; Kuhl, A. [Verfasser:in]; Wiotte, F. [Verfasser:in]; Meynadier, F. [Verfasser:in]; Camisard, E. [Verfasser:in]; Abgrall, M. [Verfasser:in]; Lours, M. [Verfasser:in]; Legero, T. [Verfasser:in]; [...]

Erschienen: London : Nature Publishing Group, 2016

Ausgabe: published Version

Sprache: Englisch

DOI: https://doi.org/10.15488/750; https://doi.org/10.1038/ncomms12443

ISSN: 2041-1723

Schlagwörter: magnetooptical trap ; Optical clock performance ; MOT ; clock

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Beschreibung: 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. ; Agence Nationale de la Recherche/ANR blanc LIOM 2011-BS04-009-01 ; Agence Nationale de la Recherche/Labex First-TF ANR-10-LABX-48-01 ; Agence Nationale de la Recherche/Equipex REFIMEVEþ ANR-11-EQPX-0039 ; European Metrology Research Programme/SIB-02 NEAT-FT ; European Metrology Research Programme/SIB-55 ITOC ; Centre National d’E´ tudes Spatiales (CNES) ; Conseil Re´gional Iˆle-de-France (DIM Nano’K) ; CNRS with Action Specifique Gravitation, References, Astronomie, Metrologie (GRAM) ; DFG/RTG/1729 ; DFG/CRC/1128 geo-Q ; QUEST

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A clock network for geodesy and fundamental science - [published Version]

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