111 citations · 207 across the 3 of their papers we have counts for
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physics.atom-ph2018★ 111 cited
Operational Magic Intensity for Sr Optical Lattice Clocks
Ichiro Ushijima, Masao Takamoto, Hidetoshi Katori
We experimentally investigate the lattice-induced light shift by the electric-quadrupole () and magnetic-dipole () polarizabilities and the hyperpolarizability in Sr optica…
physics.atom-ph2015★ 85 cited
Frequency ratios of Sr, Yb and Hg based optical lattice clocks and their applications
Masao Takamoto, Ichiro Ushijima, Manoj Das +8
This article describes the recent progress of optical lattice clocks with neutral strontium (Sr), ytterbium (Yb) and mercury (Hg) atoms. In particular, we pr…
physics.atom-ph2015★ 11 cited
Frequency Ratio of Hg and Sr Optical Lattice Clocks beyond the SI Limit
Kazuhiro Yamanaka, Noriaki Ohmae, Ichiro Ushijima +2
We report on a frequency ratio measurement of a Hg-based optical lattice clock referencing a Sr-based clock. Evaluations of lattice light shift, including atomic…