115In+ - 172Yb+ Coulomb Crystal Clock with 2.5×10-18 Systematic Uncertainty
- verfasst von
- H. N. Hausser, J. Keller, T. Nordmann, N. M. Bhatt, J. Kiethe, H. Liu, I. M. Richter, M. Von Boehn, J. Rahm, S. Weyers, E. Benkler, B. Lipphardt, S. Dörscher, K. Stahl, J. Klose, C. Lisdat, M. Filzinger, N. Huntemann, E. Peik, T. E. Mehlstäubler
- Abstract
We present a scalable mixed-species Coulomb crystal clock based on the S01↔P30 transition in In+115. Yb+172 ions are cotrapped and used for sympathetic cooling. Reproducible interrogation conditions for mixed-species Coulomb crystals are ensured by a conditional preparation sequence with permutation control. We demonstrate clock operation with a 1In+-3Yb+ crystal, achieving a relative systematic uncertainty of 2.5×10-18 and a relative frequency instability of 1.6×10-15/τ/1 s. We report on absolute frequency measurements with an uncertainty of 1.3×10-16 and optical frequency comparisons with clocks based on Yb+171 (E3) and Sr87. With a fractional uncertainty of 4.4×10-18, the former is - to our knowledge - the most accurate frequency ratio value reported to date. For the In+115/Sr87 ratio, we improve upon the best previous measurement by more than an order of magnitude. We also demonstrate operation with four In+115 clock ions, which reduces the instability to 9.2×10-16/τ/1 s.
- Organisationseinheit(en)
-
Institut für Quantenoptik
Laboratorium für Nano- und Quantenengineering
- Externe Organisation(en)
-
Physikalisch-Technische Bundesanstalt (PTB)
- Typ
- Artikel
- Journal
- Physical Review Letters
- Band
- 134
- Anzahl der Seiten
- 6
- ISSN
- 0031-9007
- Publikationsdatum
- 16.01.2025
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeine Physik und Astronomie
- Elektronische Version(en)
-
https://doi.org/10.48550/arXiv.2402.16807 (Zugang:
Offen)
https://doi.org/10.1103/PhysRevLett.134.023201 (Zugang: Offen)