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)