177 citations · 919 across the 15 of their papers we have counts for
13 papers · 1 filter
Absolute frequency of at uncertainty by reference to remote Primary Frequency Standards
Nils Nemitz, Tadahiro Gotoh, Fumimaru Nakagawa +4
The optical lattice clock NICT-Sr1 regularly reports calibration measurements of the international timescale TAI. By comparing measurement results to the reports of eight Primary F…
Frequency ratio of an In ion clock and a Sr optical lattice clock
Nozomi Ohtsubo, Ying Li, Nils Nemitz +4
We report on the first frequency ratio measurement of an In+ single ion clock and a Sr optical lattice clock. A hydrogen maser serves as a reference oscillator to me…
First observation with global network of optical atomic clocks aimed for a dark matter detection
P. Wcisło, P. Ablewski, K. Beloy +19
We report on the first earth-scale quantum sensor network based on optical atomic clocks aimed at dark matter (DM) detection. Exploiting differences in the susceptibilities to the…
Months-long real-time generation of a time scale based on an optical clock
Hidekazu Hachisu, Fumimaru Nakagawa, Yuko Hanado +1
Time scales consistently provide precise time stamps and time intervals by combining atomic frequency standards with a reliable local oscillator. Optical frequency standards, howev…
SI-traceable measurement of an optical frequency at low level without a local primary standard
Hidekazu Hachisu, Gérard Petit, Fumimaru Nakagawa +2
SI-traceable measurements of optical frequencies using International Atomic Time (TAI) do not require a local primary frequency reference, but suffer from an uncertainty in tracing…
Absolute frequency measurement with uncertainty below using International Atomic Time
Hidekazu Hachisu, Gérard Petit, Tetsuya Ido
The absolute frequency of the clock transition measured in 2015 was reevaluated using an improved frequency link to the SI second. The scale interval of Internation…