We compare two optical clocks based on the S 2 1/2 (F= 0)→ D 2 3/2 (F= 2) electric
quadrupole (E2) and the S 2 1/2 (F= 0)→ F 2 7/2 (F= 3) electric octupole (E3) transition of Yb …

We search for ultralight scalar dark matter candidates that induce oscillations of the fine
structure constant, the electron and quark masses, and the quantum chromodynamics …

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 of …

Transportable strontium optical lattice clocks are developed with a fractional uncertainty of
5.5× 10− 18 for applications outside laboratories. A single clock consists of a spectroscopy …

We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space
concerning the status of cold atom technologies, the prospective scientific and societal …

The comparison of distant atomic clocks is foundational to international timekee**, global
positioning and tests of fundamental physics. Optical-fibre links allow the most precise …

Optical frequency ratio of a 171Yb+ single-ion clock and a 87Sr lattice clock - IOPscience This
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The dissemination of atomic clocks with fiber-based techniques finds application in the fields
of metrology, fundamental physics, navigation, and spectroscopy but is a challenge in terms …

This paper gives a detailed account of the analysis underpinning the 2021 update to the list
of standard reference frequency values recommended by the International Committee for …

Aiming at delivering a highly available service, the French national optical fiber link network
is run mostly unmanned and automatically, with the help of a global supervision. However …