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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…
Frequency measurement of the clock transition of an indium ion sympathetically-cooled in a linear trap
Nozomi Ohtsubo, Ying Li, Kensuke Matsubara +2
We report frequency measurement of the clock transition in an 115In+ ion sympathetically-cooled with Ca+ ions in a linear rf trap. The Ca+ ions are used as a probe of the external…
Direct comparison of a Ca+ single ion clock against a Sr optical lattice clock
Kensuke Matsubara, Hidekazu Hachisu, Ying Li +7
Optical frequency comparison of the 40Ca+ clock transition ν_{Ca} (2S1/2-2D5/2, 729nm) against the 87Sr optical lattice clock transition ν_{Sr}(1S0-3P0, 698nm) has resulted in a fr…