Absolute frequency measurement of the 1S0 - 3P0 transition of 171Yb
Marco Pizzocaro, Pierre Thoumany, Benjamin Rauf, Filippo Bregolin,, Gianmaria Milani, Cecilia Clivati, Giovanni A. Costanzo, Filippo Levi and, Davide Calonico
TL;DR
This paper reports a highly precise measurement of the 171Yb 1S0 - 3P0 transition frequency using an optical lattice standard, achieving a fractional uncertainty of 5.4×10⁻¹⁶, confirming its consistency with SI second standards.
Contribution
It provides the most accurate absolute frequency measurement of the 171Yb transition, improving the precision of optical frequency standards.
Findings
Measured frequency: 518,295,836,590,863.55(28) Hz
Fractional uncertainty: 5.4×10⁻¹⁶
Agreement with SI second standard
Abstract
We report the absolute frequency measurement of the unperturbed transition 1S0 - 3P0 at 578 nm in 171Yb realized in an optical lattice frequency standard. The absolute frequency is measured 518 295 836 590 863.55(28) Hz relative to a cryogenic caesium fountain with a fractional uncertainty of 5.4x10-16 . This value is in agreement with the ytterbium frequency recommended as a secondary representation of the second in the International System of Units.
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