Final publishable report - 18SIB05 - ROCIT - Robust Optical Clocks for International Timescales

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000004" target="_blank" >RIV/00177016:_____/23:N0000004 - isvavai.cz</a>

Result on the web

<a href="http://empir.npl.co.uk/rocit/wp-content/uploads/sites/52/2023/02/18SIB05-ROCIT-Final_Publishable_Report.pdf" target="_blank" >http://empir.npl.co.uk/rocit/wp-content/uploads/sites/52/2023/02/18SIB05-ROCIT-Final_Publishable_Report.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Final publishable report - 18SIB05 - ROCIT - Robust Optical Clocks for International Timescales

Original language description

Optical atomic clocks have now reached levels of performance that clearly surpass the stability and accuracy achievable with caesium microwave primary frequency standards, with the result that a future optical redefinition of the SI second is anticipated. This project tackled key steps that must be taken prior to the redefinition. The robustness of optical clocks was improved so that they could run unattended for long periods, methods were developed for automatic data validation enabling prototype demonstrations of optically steered timescales, and the long-term reliability and reproducibility of the clocks were assessed through a coordinated programme of international comparisons. By the end of the project several European optical clocks were contributing on a regular basis to International Atomic Time (TAI) as secondary representations of the second, improving its stability and accuracy. These steps represent important progress towards the criteria set out in the international roadmap towards a redefinition of the second, and since international timescales underpin modern-day technology such as telecommunications and navigation systems, the work will benefit end users across a wide range of sectors in the longer term.

Czech name

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Czech description

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Type

V_souhrn - Summary research report

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

<a href="/en/project/8B19008" target="_blank" >8B19008: Robust Optical Clocks for International Timescales</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Number of pages

23

Place of publication

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Publisher/client name

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Version

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