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Unprecedented Optical Clock Network Lays Groundwork for Redefining the Second
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6 Articles
10 Atomic Clocks Connected Across 6 Countries In Most Ambitious Timekeeping Experiment Ever
Every clock in your house probably tells a slightly different time. Now picture those clocks as the most precise instruments humanity has ever built, so accurate that they wouldn't lose or gain a second for billions of years. The post 10 Atomic Clocks Connected Across 6 Countries In Most Ambitious Timekeeping Experiment Ever appeared first on Study Finds.
Unprecedented optical clock network lays groundwork for redefining the second
In a new study, researchers carried out the most extensive coordinated comparison of optical clocks to date by operating clocks and the links connecting them simultaneously across six countries. Spanning thousands of kilometers, the experiment represents a significant step toward redefining the second and ultimately establishing a global optical time scale.
Towards a new definition of the second thanks to a worldwide network of atomic clocks HugoHardy Fri 13/06/2025 - 17:10 Content Published on 12 June 2025 in the journal Optica, an international study presents the simultaneous comparison of ten optical clocks in six countries, via optical fibers and satellite links. The Laboratoire Temps-Espace (LTE) of the Observatoire de Paris–PSL contributed to this advance, which marks a step towards the creat…
For the first time, a coordinated network of optical clocks distributed in Europe and Asia has managed to compare their measurements with unprecedented accuracy, exceeding the limits of atomic cesium clocks. This technological feat marks a milestone in metrology and brings the redefinition of the second, the fundamental unit of time, to a new era based on light and not on microwaves.
In a new study, the researchers carried out the most extensive coordinated comparison of optical clocks to date by operational clocks and the links linking them simultaneously in six countries. Extending thousands of kilometres, the experiment represents a significant step towards the redefinition of the second and, finally, the establishment of a time scale [...]
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