We propose metasurface holograms as a novel platform to generate optical trap arrays for
cold atoms with high quality, efficiency, and thermal stability. We developed design and …

We search for ultralight scalar dark matter candidates that induce oscillations of the fine
structure constant, the electron and quark masses, and the quantum chromodynamics …

This paper outlines the roadmap towards the redefinition of the second, which was recently
updated by the CCTF Task Force created by the CCTF in 2020. The main achievements of …

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

Pound–Drever–Hall (PDH) laser frequency stabilization is a powerful technique widely used
for building narrow linewidth lasers. This technique is, however, ineffective in suppressing …

We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space
concerning the status of cold atom technologies, the prospective scientific and societal …

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 …

We present the compact long-term nearly continuous operation of a room-temperature Ca+-
optical-clock setup towards a transportable clock, achieving an overall systematic …

Rapid and repeated photon cycling has enabled precision metrology and the development
of quantum information systems using atoms and simple molecules. Extending optical …

Optical atomic clocks are currently one of the most sensitive tools making it possible to
precisely test the fundamental symmetry properties of spacetime and Einstein's theory of …