369 citations · 383 across the 3 of their papers we have counts for
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physics.atom-ph2025★ 11 cited
Sr optical clock with systematic uncertainty and measurement of its absolute frequency with uncertainty
T. Lindvall, T. Fordell, K. J. Hanhijärvi +4
We report on a Sr single-ion optical clock with an estimated fractional systematic uncertainty of . The low uncertainty is enabled by small rf loss…
physics.atom-ph2023★ 3 cited
Continuous optical generation of microwave signals for fountain clocks
Burghard Lipphardt, Patrick Walkemeyer, Michael Kazda +2
For the optical generation of ultrastable microwave signals for fountain clocks we developed a setup, which is based on a cavity stabilized laser and a commercial frequency comb. T…
physics.atom-ph2014★ 369 cited
Improved limit on a temporal variation of from comparisons of Yb and Cs atomic clocks
N. Huntemann, B. Lipphardt, Chr. Tamm +3
Accurate measurements of different transition frequencies between atomic levels of the electronic and hyperfine structure over time are used to investigate temporal variations of t…