Coordinated international comparisons between optical clocks connected via fiber and satellite links

authored by: Thomas Lindvall, Marco Pizzocaro, Rachel M. Godun, Michel Abgrall, Daisuke Akamatsu, Anne Amy-Klein, Erik Benkler, Nishant M. Bhatt, Davide Calonico, Etienne Cantin, Elena Cantoni, Giancarlo Cerretto, Christian Chardonnet, Miguel Angel Cifuentes Marin, Cecilia Clivati, Stefano Condio, E. Anne Curtis, Heiner Denker, Simone Donadello, Sören Dörscher, Chen Hao Feng, Melina Filzinger, Thomas Fordell, Irene Goti, Kalle Hanhijärvi, H. Nimrod Hausser, Ian R. Hill, Kazumoto Hosaka, Nils Huntemann, Matthew Y.H. Johnson, Jonas Keller, Joshua Klose, Takumi Kobayashi, Sebastian Koke, Alexander Kuhl, Rodolphe Le Targat, Thomas Legero, Filippo Levi, Burghard Lipphardt, Christian Lisdat, Hongli Liu, Jérôme Lodewyck, Olivier Lopez, Maxime Mazouth-Laurol, Tanja E. Mehlstäubler, Alberto Mura, Akiko Nishiyama, Tabea Nordmann, Adam O. Parsons, Gérard Petit, Benjamin Pointard, Paul Eric Pottie, Matias Risaro, Billy I. Robertson, Marco Schioppo, Haosen Shang, Kilian Stahl, Martin Steinel, Uwe Sterr, Alexandra Tofful, Mads Tønnes, Dang Bao An Tran, Jacob Tunesi, Anders E. Wallin, Helen S. Margolis
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.
Organisation(s): Institute of Geodesy
Institute of Quantum Optics
External Organisation(s): VTT Technical Research Centre of Finland Ltd.
Istituto Nazionale di Ricerca Metrologica (INRiM)
National Physical Laboratory (NPL)
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
International Bureau of Weights and Measures (BIPM)
Type: Article
Journal: OPTICA
Volume: 12
Pages: 843-852
No. of pages: 10
ISSN: 2334-2536
Publication date: 20.06.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics
Electronic version(s): https://doi.org/10.1364/OPTICA.561754 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{422d6aa5b0c14670921434134717652d,
title = "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.",
author = "Thomas Lindvall and Marco Pizzocaro and Godun, {Rachel M.} and Michel Abgrall and Daisuke Akamatsu and Anne Amy-Klein and Erik Benkler and Bhatt, {Nishant M.} and Davide Calonico and Etienne Cantin and Elena Cantoni and Giancarlo Cerretto and Christian Chardonnet and Marin, {Miguel Angel Cifuentes} and Cecilia Clivati and Stefano Condio and Curtis, {E. Anne} and Heiner Denker and Simone Donadello and S{\"o}ren D{\"o}rscher and Feng, {Chen Hao} and Melina Filzinger and Thomas Fordell and Irene Goti and Kalle Hanhij{\"a}rvi and Hausser, {H. Nimrod} and Hill, {Ian R.} and Kazumoto Hosaka and Nils Huntemann and Johnson, {Matthew Y.H.} and Jonas Keller and Joshua Klose and Takumi Kobayashi and Sebastian Koke and Alexander Kuhl and {Le Targat}, Rodolphe and Thomas Legero and Filippo Levi and Burghard Lipphardt and Christian Lisdat and Hongli Liu and J{\'e}r{\^o}me Lodewyck and Olivier Lopez and Maxime Mazouth-Laurol and Mehlst{\"a}ubler, {Tanja E.} and Alberto Mura and Akiko Nishiyama and Tabea Nordmann and Parsons, {Adam O.} and G{\'e}rard Petit and Benjamin Pointard and Pottie, {Paul Eric} and Matias Risaro and Robertson, {Billy I.} and Marco Schioppo and Haosen Shang and Kilian Stahl and Martin Steinel and Uwe Sterr and Alexandra Tofful and Mads T{\o}nnes and Tran, {Dang Bao An} and Jacob Tunesi and Wallin, {Anders E.} and Margolis, {Helen S.}",
note = "Publisher Copyright: {\textcopyright} 2025 Optica Publishing Group.",
year = "2025",
month = jun,
day = "20",
doi = "10.1364/OPTICA.561754",
language = "English",
volume = "12",
pages = "843--852",
journal = "OPTICA",
issn = "2334-2536",
publisher = "Optica Publishing Group (formerly OSA)",
number = "6",
}