5 papers
Characterization of rf field-induced a.c. Zeeman shift in multi-level highly charged ions
Shuying Chen, Lukas J. SpieÃ, Alexander Wilzewski +3
Characterization of the trap rf induced a.c. Zeeman shift is essential for achieving high accuracy in optical ion clocks. In this work, we demonstrate the experimental characteriza…
Line search by quantum logic spectroscopy enhanced with squeezing and statistical tests
Ivan Vybornyi, Shuying Chen, Lukas J. Spieà +2
In quantum logic spectroscopy, internal transitions of trapped ions and molecules can be probed by measuring the motional displacement caused by an applied light field of variable…
Excited-state magnetic properties of carbon-like
Lukas J. SpieÃ, 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…
Finding the ultra-narrow electric quadrupole transition in Ni ion for an optical clock
Charles Cheung, Sergey G. Porsev, Dmytro Filin +7
The Ni ion features an electronic transition with a natural width of only 8 mHz, allowing for a highly stable optical clock. We predict that the energy of this strongly for…
Identification of highly-forbidden optical transitions in highly charged ions
Shuying Chen, Lukas J. SpieÃ, Alexander Wilzewski +6
Optical clocks represent the most precise experimental devices, finding application in fields spanning from frequency metrology to fundamental physics. Recently, the first highly c…