Optical frequency ratio of a 171Yb+ single-ion clock and a 87Sr lattice clock
Abstract
We report direct measurements of the frequency ratio of the 642 THz 2S1/2(F = 0)-2F7/2(F = 3) electric octupole transition in 171Yb+ and the 429 THz 1S0 -3P0 transition in 87Sr. A series of 107 measurements has been performed at the Physikalisch-Technische Bundesanstalt between December 2012 and October 2019. Long-term variations of the ratio are larger than expected from the individual measurement uncertainties of few 10−17. The cause of these variations remains unknown. Even taking these into account, we find a fractional uncertainty of the frequency ratio of 2.5 × 10−17, which improves upon previous knowledge by one order of magnitude. The average frequency ratio is νYb+ /νSr = 1.495 991 618 544 900 537(38). This represents one of the most accurate measurements between two different atomic species to date.
Details
- Externe Organisation(en)
-
Physikalisch-Technische Bundesanstalt (PTB)
- Typ
- Artikel
- Journal
- METROLOGIA
- Band
- 58
- ISSN
- 0026-1394
- Publikationsdatum
- 02.2021
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeiner Maschinenbau
- Elektronische Version(en)
-
https://doi.org/10.1088/1681-7575/abc86f (Zugang:
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