B. Lipphardt

Limit on the Present Temporal Variation of the Fine Structure Constant

E. Peik, B. Lipphardt, H. Schnatz et al. · Physical Review Letters · 2004 · 272 citations · Full text

First Phase-Coherent Frequency Measurement of Visible Radiation

H. Schnatz, B. Lipphardt, J. Helmcke et al. · Physical Review Letters · 1996 · 237 citations

Improved Limits for Violations of Local Position Invariance from Atomic Clock Comparisons

R. Lange, Nils Huntemann, Johannes Rahm et al. · Physical Review Letters · 2021 · 194 citations · Full text

Optical frequency transfer via 146 km fiber link with 10^−19 relative accuracy

Gesine Grosche, Osama Terra, Katharina Predehl et al. · Optics Letters · 2009 · 156 citations · Full text

Frequency Metrology, Engineering, Optical Transmission System +19

Advances in the accuracy, stability, and reliability of the PTB primary fountain clocks

S. Weyers, Vladislav Gerginov, Michael Kazda et al. · Metrologia · 2018 · 133 citations · Full text

Microwave Spectroscopy, Precision Measurement, Time Dissemination +11