We review experimental progress on optical atomic clocks and frequency transfer, and
consider the prospects of using these technologies for geodetic measurements. Today …

A list of standard reference frequency values (LoF) of quantum transitions from the
microwave to the optical regime has been recommended by the International Committee for …

The last decade has witnessed tremendous progress in research on optical frequency
metrology. Optical frequency standards using optical lattice and single-ion trap technologies …

Within the last decade, optical atomic clocks have surpassed the best cesium clocks, which
are used to realize the unit of time and frequency, in terms of accuracy and stability by about …

Transition frequencies of atoms and ions are among the most accurately accessible
quantities in nature, playing important roles in pushing the frontiers of science by testing …

Transportable strontium optical lattice clocks are developed with a fractional uncertainty of
5.5× 10− 18 for applications outside laboratories. A single clock consists of a spectroscopy …

Neutral quantum absorbers in optical lattices have emerged as a leading platform for
achieving clocks with exquisite spectroscopic resolution. However, the studies of these …

We experimentally investigate the lattice-induced light shift by the electric-quadrupole (E 2)
and magnetic-dipole (M 1) polarizabilities and the hyperpolarizability in Sr optical lattice …

The unprecedented stability and accuracy of optical atomic clocks extend their role not only
in frequency metrology but also in fundamental physics and geodesy. In particular, excellent …

Optical frequency ratio of a 171Yb+ single-ion clock and a 87Sr lattice clock - IOPscience This
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