133 citations · 497 across the 15 of their papers we have counts for
12 papers · 1 filter
Excited-state magnetic properties of carbon-like
Lukas J. Spieß, Shuying Chen, Alexander Wilzewski +13
We measured the -factor of the excited state in ion to be with a relative uncertainty of . The magnetic field…
High-accuracy multi-ion spectroscopy with mixed-species Coulomb crystals
J. Keller, H. N. Hausser, I. M. Richter +14
Multi-ion optical clocks offer the possibility of overcoming the low signal-to-noise ratio of single-ion clocks, while still providing low systematic uncertainties. We present simu…
Nonlinear calcium King plot constrains new bosons and nuclear properties
A. Wilzewski, L. I. Huber, M. Door +39
Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence of beyond-Standard-Model (BSM) interactions that couple electrons and neutrons. However, it is cru…
Probing new bosons and nuclear structure with ytterbium isotope shifts
Menno Door, Chih-Han Yeh, Matthias Heinz +24
In this Letter, we present mass-ratio measurements on highly charged Yb ions with a precision of and isotope-shift measurements on Yb on the …
In-Yb Coulomb crystal clock with systematic uncertainty
H. N. Hausser, J. Keller, T. Nordmann +17
We present a scalable mixed-species Coulomb crystal clock based on the transition in In. Yb ions are co-trapped and used f…
Atomic photoexcitation as a tool for probing purity of twisted light modes
R. P. Schmidt, S. Ramakrishna, A. A. Peshkov +4
The twisted light modes used in modern atomic physics experiments can be contaminated by small admixtures of plane wave radiation. Although these admixtures hardly reveal themselve…
Improved limits on the coupling of ultralight bosonic dark matter to photons from optical atomic clock comparisons
M. Filzinger, S. Dörscher, R. Lange +6
We present improved constraints on the coupling of ultralight bosonic dark matter to photons based on long-term measurements of two optical frequency ratios. In these optical clock…
Evaluation of a Sr optical clock with a direct measurement of the blackbody radiation shift and determination of the clock frequency
M. Steinel, H. Shao, M. Filzinger +7
We report on an evaluation of an optical clock that uses the transition of a single Sr ion as the reference. In con…
Lifetime of the level in Yb for spontaneous emission of electric octupole radiation
R. Lange, A. A. Peshkov, N. Huntemann +3
We report a measurement of the radiative lifetime of the level of Yb that is coupled to the ground state via an electric octupole transition. Th…
Generalized excitation of atomic multipole transitions by twisted light modes
S. A. -L. Schulz, A. A. Peshkov, R. A. Müller +5
A theoretical study is performed for the excitation of a single atom localized in the center of twisted light modes. Here we present the explicit dependence of excitation rates on…
Analysis of thermal radiation in ion traps for optical frequency standards
Miroslav Doležal, Petr Balling, Peter B R Nisbet-Jones +16
In many of the high-precision optical frequency standards with trapped atoms or ions that are under development to date, the AC Stark shift induced by thermal radiation leads to a…
Direct comparison of optical lattice clocks with an intercontinental baseline of 9 000 km
H. Hachisu, M. Fujieda, S. Nagano +9
We have demonstrated a direct frequency comparison between two lattice clocks operated in intercontinentally separated laboratories in real time. Two-way satellite…