The optical calcium frequency standards of PTB and NIST ⋆ Les étalons de fréquence optique au calcium de la PTB et du NIST


We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible future optical atomic clock. Frequency measurements performed at the Physikalisch-Technische Bundesanstalt (PTB) and the National Institute of Standards and Technology (NIST… (More)


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