S
Stefan Weyers
Researcher at German National Metrology Institute
Publications - 87
Citations - 3896
Stefan Weyers is an academic researcher from German National Metrology Institute. The author has contributed to research in topics: Atomic clock & Atomic fountain. The author has an hindex of 28, co-authored 87 publications receiving 3494 citations.
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Journal ArticleDOI
Improved Limit on a Temporal Variation of m p / m e from Comparisons of Yb + and Cs Atomic Clocks
TL;DR: The frequency of the (2)S1/2→(2)F7/2 electric octupole (E3) transition in (171)Yb(+) is measured against two caesium fountain clocks as f(E3)=642,121,496,772,645.36 Hz with an improved fractional uncertainty of 3.9×10(-16).
Journal ArticleDOI
Atomic fountain clocks
R. Wynands,Stefan Weyers +1 more
TL;DR: The current state of the art in atomic fountain clocks is described and reviewed in this paper, with relative uncertainties of a few parts in 1016, and the current state-of-the-art clocks provide the best realization of the SI second possible today.
Journal ArticleDOI
High-Accuracy Optical Clock Based on the Octupole Transition in Yb + 171
TL;DR: An optical frequency standard based on the 467 nm electric-octupole reference transition with real-time extrapolation scheme that eliminates the probe-light-induced ac Stark shift of the octupole transition is experimentally investigated.
Journal ArticleDOI
Precision measurement of the hydrogen 1S-2S frequency via a 920-km fiber link.
Arthur Matveev,Christian G. Parthey,Katharina Predehl,Janis Alnis,Axel Beyer,Ronald Holzwarth,Thomas Udem,Tobias Wilken,Nikolai N. Kolachevsky,Michel Abgrall,Daniele Rovera,Christophe Salomon,Philippe Laurent,Gesine Grosche,Osama Terra,Thomas Legero,Harald Schnatz,Stefan Weyers,Brett Altschul,Theodor W. Hänsch +19 more
TL;DR: The frequency of the extremely narrow 1S-2S two-photon transition in atomic hydrogen is measured using a remote cesium fountain clock with the help of a 920 km stabilized optical fiber with a relative uncertainty of 4.5×10(-15).
Journal ArticleDOI
A strontium lattice clock with $3 \times 10^{-17}$ inaccuracy and its frequency
Stephan Falke,Nathan D. Lemke,Christian Grebing,Burghard Lipphardt,Stefan Weyers,Vladislav Gerginov,Nils Huntemann,Christian Hagemann,A. Al-Masoudi,Sebastian Häfner,Stefan Vogt,Uwe Sterr,Christian Lisdat +12 more
TL;DR: In this paper, the absolute frequency of the optical lattice clock based on $87}$Sr at PTB with an uncertainty of 3.9\times 10^{-16}$ using two caesium fountain clocks was measured.