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Roadmap towards the redefinition of the second

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arxiv 2307.14141 v1 pith:Y34BLM2Y submitted 2023-07-26 physics.atom-ph physics.ins-det

N. Dimarcq , M. Gertsvolf , G. Mileti , S.Bize , C.W. Oates , E. Peik , D. Calonico , T. Ido
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P. Tavella F. Meynadier G. Petit G. Panfilo J. Bartholomew P. Defraigne E. A. Donley P. O. Hedekvist I. Sesia M. Wouters P. Dube F. Fang F. Levi J. Lodewyck H. S. Margolis D. Newell S. Slyusarev S. Weyers J.-P. Uzan M. Yasuda D.-H. Yu C. Rieck H. Schnatz Y. Hanado M. Fujieda P.-E. Pottie J. Hanssen A. Malimon N. Ashby
This is my paper · ORCID
classification physics.atom-phphysics.ins-det
keywords redefinitioncctflevelroadmapsecondtowardsachievedachievements
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This paper outlines the roadmap towards the redefinition of the second, which was recently updated by the CCTF Task Force created by the CCTF in 2020. The main achievements and the open challenges related to the status of the optical frequency standards, their contribution to time scales and UTC, the possibility of their comparison and the knowledge of the Earth's gravitational potential at the necessary level of uncertainty are discussed. In addition, the mandatory criteria to be achieved before redefinition and their current fulfilment level, together with the redefinition options based on a single or on a set of transitions are described.

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