Coordinated international comparisons between optical clocks connected via fiber and satellite links
Abstract
Optical clocks provide ultraprecise frequency references that are vital for international metrology as well as for tests of fundamental physics. To investigate the level of agreement between different clocks, we simultaneously measured the frequency ratios between ten optical clocks in six different countries, using fiber and satellite links. This is the largest coordinated comparison to date, from which we present a subset of 38 optical frequency ratios and an evaluation of the correlations between them. Four ratios were measured directly for the first time to our knowledge, while others had significantly lower uncertainties than previously achieved, supporting the advance toward a redefinition of the second and the use of optical standards for international time scales.
Details
- Organisationseinheit(en)
-
Institut für Erdmessung
Institut für Quantenoptik
- Externe Organisation(en)
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VTT Technical Research Centre of Finland Ltd.
Istituto Nazionale di Ricerca Metrologica (INRiM)
National Physical Laboratory
Observatoire de Paris (OBSPARIS)
National Institute of Advanced Industrial Science and Technology (AIST)
Yokohama National University
Laboratoire de Physique des Lasers (LPL)
Physikalisch-Technische Bundesanstalt (PTB)
Internationales Büro für Maß und Gewicht (BIPM)
- Typ
- Artikel
- Journal
- OPTICA
- Band
- 12
- Seiten
- 843-852
- Anzahl der Seiten
- 10
- ISSN
- 2334-2536
- Publikationsdatum
- 20.06.2025
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik
- Elektronische Version(en)
-
https://doi.org/10.1364/OPTICA.561754 (Zugang:
Offen
)
