An optical atomic clock based on a highly charged ion

SA King, LJ Spieß, P Micke, A Wilzewski, T Leopold… - Nature, 2022 - nature.com
Optical atomic clocks are the most accurate measurement devices ever constructed and
have found many applications in fundamental science and technology,–. The use of highly …

New horizons: Scalar and vector ultralight dark matter

D Antypas, A Banerjee, C Bartram… - ar** and Ground-State Cooling of a Single
N Schwegler, D Holzapfel, M Stadler, A Mitjans… - Physical Review Letters, 2023 - APS
We demonstrate co-trap** and sideband cooling of a H 2+-Be 9+ ion pair in a cryogenic
Paul trap. We study the chemical lifetime of H 2+ and its dependence on the apparatus …

Cooling trapped ions with phonon rapid adiabatic passage

MI Fabrikant, P Lauria, IS Madjarov, WC Burton… - Physical Review X, 2024 - APS
In recent demonstrations of the quantum charge-coupled device computer architecture,
circuit times are dominated by cooling. Some motional modes of multi-ion crystals take …

Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions

NH Rehbehn, MK Rosner, H Bekker, JC Berengut… - Physical Review A, 2021 - APS
Promising searches for new physics beyond the current standard model (SM) of particle
physics are feasible through isotope-shift spectroscopy, which is sensitive to a hypothetical …

Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators

PY Hou, JJ Wu, SD Erickson, G Zarantonello… - Physical Review X, 2024 - APS
Cooling the motion of trapped ions to near the quantum ground state is crucial for many
applications in quantum information processing and quantum metrology. However, certain …

Quadratic Zeeman and electric quadrupole shifts in highly charged ions

J Gilles, S Fritzsche, LJ Spieß, PO Schmidt… - Physical Review A, 2024 - APS
Recent advances in high-precision spectroscopy of highly charged ions necessitate an
understanding of energy shifts of ionic levels caused by external electric and magnetic …

Continuous raman sideband cooling beyond the lamb-dicke regime in a trapped ion chain

Q Wu, Y Shi, J Zhang - Physical Review Research, 2023 - APS
We report continuous Raman sideband cooling of a long ion chain close to the motional
ground state beyond the Lamb-Dicke (LD) regime. By driving multiple sideband transitions …