204 citations · 793 across the 8 of their papers we have counts for
8 papers
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…
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…
Improved limits for violations of local position invariance from atomic clock comparisons
R. Lange, N. Huntemann, J. M. Rahm +6
We compare two optical clocks based on the SD electric quadrupole (E2) and the SF electric octupole (E3)…
Realization of a time-scale with an accurate optical lattice clock
C. Grebing, A. Al-Masoudi, S. Dörscher +7
Optical clocks are not only powerful tools for prime fundamental research, but are also deemed for the re-definition of the SI base unit second as they now surpass the performance…
A Cs-Based Optical Frequency Measurement Using Cross-Linked Optical and Microwave Oscillators
Chr. Tamm, N. Huntemann, B. Lipphardt +5
We describe a measurement of the frequency of the 2S1/2(F = 0) - 2D3/2(F' = 2) transition of 171Yb+ at the wavelength 436 nm (frequency 688 THz), using a single Yb+ ion confined in…
Distributed cavity phase frequency shifts of the caesium fountain PTB-CSF2
S. Weyers, V. Gerginov, N. Nemitz +2
We evaluate the frequency error from distributed cavity phase in the caesium fountain clock PTB-CSF2 at the Physikalisch-Technische Bundesanstalt with a combination of frequency me…
The 87-Sr optical frequency standard at PTB
St. Falke, H. Schnatz, J. S. R. Vellore Winfred +8
With 87-Sr atoms confined in a one dimensional optical lattice, the frequency of the optical clock transition 5s^2 ^1S_0 - 5s5p ^3P_0 has been determined to be 429 228 004 229 872.…
Absolute frequency measurement of the 171Yb+ clock transition with a Kerr-lens mode-locked femtosecond laser
Joern Stenger, Christian Tamm, Nils Haverkamp +2
We have measured the frequency of the electric-quadrupole transition of Yb with a relative uncertainty of , = 688…