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Robust Optical Clocks for International Timescales (ROCIT)

2024; IOP Publishing; Volume: 2889; Issue: 1 Linguagem: Inglês

10.1088/1742-6596/2889/1/012022

1742-6596

H. S. Margolis, R. M. Godun, N. Huntemann, Rodolphe Le Targat, Marco Pizzocaro, M. Zawada, Michel Abgrall, Daisuke Akamatsu, Héctor Álvarez Martínez, Anne Amy‐Klein, Manuel Andia, Erik Benkler, N. M. Bhatt, Sławomir Bilicki, S. Bize, Marcin Bober, Davide Calonico, Valentin Cambier, Etienne Cantin, Ch. Chardonnet, María C. Marín, Cecilia Clivati, Stefano Condio, E. A. Curtis, A. Czubla, Miroslav Doležal, Sören Dörscher, P. Dunst, C. Feng, Melina Filzinger, R. Folman, Thomas Fordell, Valerio Formichella, Yannick Foucault, Lorenzo Galleani, Irene Goti, David Groswasser, Maciej Gruszczyński, Changlei Guo, Kalle Hanhijärvi, H. N. Hausser, Ian R. Hill, Kazumoto Hosaka, M Y H Johnson, Jonas Keller, J. Klose, T. Kobayashi, Sebastian Koke, Domagoj Kovačić, Petr Křen, Alexander Kühl, Adam Ledziński, D. Lemański, Filippo Levi, Thomas Lindvall, Christian Lisdat, Haiqiang Liu, Jérôme Lodewyck, Olivier Lopez, L. Lorini, M. Lours, Pavel Mašika, M Mazouth-Laurol, T. E. Mehlstäubler, William Moreno, Piotr Morzyński, M. Narożnik, J. Nawrocki, Akiko Nishiyama, Paweł Nogaś, T Nordmann, Adam O. Parsons, Benjamin Pointard, Paul-Éric Pottie, Matias Risaro, Billy Robertson, Julio Romero González, M. Schioppo, I. Sesia, Haosen Shang, G. Signorile, Kenny Ståhl, Martin Steinel, Uwe Sterr, J. M. Ramírez, Alexandra Tofful, Mads Tønnes, Albert Tran, Jacob Tunesi, Anders Wallin, Thomas Waterholter, Mehrdad Zarei, Clara Zyskind,

Cold Atom Physics and Bose-Einstein Condensates

Abstract The recently concluded collaborative European project “Robust optical clocks for international timescales” (ROCIT) tackled some of the key challenges on the roadmap towards a redefinition of the SI second. This paper gives an overview of progress made on improving the robustness and automation of optical clocks and verifying their uncertainty budgets through coordinated international comparison campaigns. It also presents work on the incorporation of optical clocks into time scales, covering both their use to steer local physical time scales and their use for evaluations of hydrogen masers contributing data for the computation of International Atomic Time (TAI). The overall objective of the project was to bring European optical clocks to the stage where they could be operated routinely as secondary frequency standards, regularly contributing to TAI.