European Conference on Trapped Ions (ECTI)

Singly ionized lutetium ($^{176}$Lu$^+$) has a unique level structure that provides multiple clock transitions. In combination with hyperfine averaging, two of these transitions ($^1{S}_0$ – ${}^3D_1$ & $^1{S}_0$ – ${}^3D_2$) present both a long lifetime and low sensitivity to the electromagnetic environment, which allows high performance clock operation on both transitions. Recently we have...

Here our progress on the Ca+ ion optical clocks for the last few years will be reported, including both the laboratory clocks and the transportable clock.
A cryogenic Ca+ clock at the liquid nitrogen environment is built, with the blackbody radiation (BBR) shift uncertainty greatly suppressed, and improvements made with other systematic uncertainties, the overall systematic uncertainty of...

Optical clocks based on mixed-species Coulomb crystals promise reductions of both statistical and systematic uncertainties beyond the state of the art.

We operate an optical clock based on the combination of ${}^{115}$In${}^+$ (clock) and ${}^{172}$Yb${}^+$ (auxiliary) ions, which we have identified as a candidate for multi-clock-ion operation with $10^{-19}$ level systematic uncertainties...

Visible light photonic integration will enable compact, low weight, and reliable quantum and atomic sensing systems. In this talk we will review the latest advances in the ultra-low loss silicon nitride integration platform and heterogeneous integration, that enable quantum systems on chip (QSOC). Various technologies supported include visible light and ultra-narrow linewidth lasers, ...

The energy levels of hydrogen-like atoms can be precisely described by bound-state quantum
electrodynamics (QED). The frequency of the narrow 1s-2s transition of atomic hydrogen has
been measured with a relative uncertainty below $10^{−14}$. When combined with other spectroscopic
measurements of hydrogen and hydrogen-like atoms, the Rydberg constant and the proton charge
radius can be...

The antiProton Unstable Matter Annihilation (PUMA) experiment is a nuclear physics experiment at CERN which will determine the ratio of protons to neutrons in the nuclear density tail based on the peripheral annihilation of low-energy antiprotons, providing a new observable to test nuclear structure theory. As the annihilation conserves the total charge, the annihilated nucleon can be...