The absolute frequency of the transition was measured versus cesium to be 1 064 721 609 899 144.94 (97) Hz, with a statistically limited total fractional uncertainty of
9.1
×
10
−
16
, the most accurate absolute measurement of an optical frequency to date.
The absolute frequency of the transition was measured versus cesium to be 1 064 721 609 899 144.94 (97) Hz, with a statistically limited total fractional uncertainty of
9.1
×
10
−
16
, the most accurate absolute measurement of an optical frequency to date.
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