12 citations · 27 across the 4 of their papers we have counts for
5 papers · 1 filter
The stability of an optical clock laser transferred to the interrogation oscillator for a Cs fountain
B. Lipphardt, G. Grosche, U. Sterr +3
We stabilise a microwave oscillator at 9.6 GHz to an optical clock laser at 344 THz by using a fibre-based femtosecond laser frequency comb as a transfer oscillator. With a second…
Laboratory Limits on Temporal Variations of Fundamental Constants: An Update
E. Peik, B. Lipphardt, H. Schnatz +3
Precision comparisons of different atomic frequency standards over a period of a few years can be used for a sensitive search for temporal variations of fundamental constants. We p…
Laser frequency stabilization to a single ion
Ekkehard Peik, Tobias Schneider, Christian Tamm
A fundamental limit to the stability of a single-ion optical frequency standard is set by quantum noise in the measurement of the internal state of the ion. We discuss how the inte…
Frequency comparisons and absolute frequency measurements of 171Yb+ single-ion optical frequency standards
E. Peik, B. Lipphardt, H. Schnatz +3
We describe experiments with an optical frequency standard based on a laser cooled Yb ion confined in a radiofrequency Paul trap. The electric-quadrupole transition fro…
New limit on the present temporal variation of the fine structure constant
E. Peik, B. Lipphardt, H. Schnatz +3
The comparison of different atomic transition frequencies over time can be used to determine the present value of the temporal derivative of the fine structure constant alpha in a…