On a definition of the SI second with a set of optical clock transitions
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DOI: 10.1088/1681-7575/ab3a82
Abstract: The current SI second based on the atomic hyperfine transition in the ground state of 133Cs is expected to be replaced by a new definition based on optical frequency standards, whose estimated uncertainty has now… read more here.
Keywords: second set; definition second; unit; set optical ... See more keywords