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80 papers · 1 filter
International Optical Clock Comparison Using the European Optical Fiber Network
Marco Pizzocaro, Clara Zyskind, Anne Amy-Klein +41
Optical clocks have achieved remarkable estimated fractional frequency uncertainties reaching the level and below, enabling applications in fundamental physics, general…
Fault-tolerant hyper-Ramsey spectroscopy of optical clock transitions with dynamical decoupling
B. Ilikj, T. Zanon-Willette, D. Wilkowski +2
A probe laser field that interrogates an atomic transition also shifts it. Although Hyper-Ramsey (HR) spectroscopy was developed to mitigate these light-induced frequency shifts, t…
Coordinated international comparisons between optical clocks connected via fiber and satellite links
Thomas Lindvall, Marco Pizzocaro, Rachel M. Godun +62
Optical clocks provide ultra-precise frequency references that are vital for international metrology as well as for tests of fundamental physics. To investigate the level of agreem…
Microwave spectroscopy of ultracold-sodium least-bound molecular states
Manon Ballu, Zhibin Yao, Bastien Mirmand +3
We have performed microwave spectroscopy of sodium least-bound molecular states, improving the precision of the knowledge of their energies at zero magnetic field by almost three o…
Comb-referenced Doppler-free spectrometry of the Hg and Hg intercombination line at 254 nm
Stefania Gravina, Naveed A. Chishti, Simona Di Bernardo +4
We report on precision spectroscopy of the 6s S6s6p P intercombination line of mercury in the deep ultraviolet, by means of a frequency-comb referenced, wave…
Wavelength modulation laser spectroscopy of NO at 17 m
Y. Wang, J. Rodewald, O. Lopez +4
Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of NO in the 17 m regi…