This article reviews recent developments in tests of fundamental physics using atoms and
molecules, including the subjects of parity violation, searches for permanent electric dipole …

In many theories beyond the Standard Model the quantities that we call “fundamental
constants” become space‐time dependent, leading to corresponding variation of atomic and …

One of the key systematic effects limiting the performance of state-of-the-art optical clocks is
the blackbody radiation (BBR) shift. Here, we demonstrate unusually low sensitivity of a 1.14 …

According to general relativity, a clock experiencing a shift in the gravitational potential Δ U
will measure a frequency change given by Δ f/f≈ Δ U/c 2. The best clocks are optical clocks …

The efficiency of the optical trapping of ultracold atoms depends on the atomic dynamic
dipole polarizability governing the atom-field interaction. In this article, we have calculated …

The sensitivity of an atomic interferometer increases when the phase evolution of its
quantum superposition state is measured over a longer interrogation interval. In practice, a …

We report on the observation and coherent excitation of atoms on the narrow inner-shell
orbital transition, connecting the erbium ground state [Xe] 4 f 12 (3 H 6) 6 s 2 to the excited …

Ultracold atoms confined in a dipole trap are submitted to a potential whose depth is
proportional to the real part of their dynamic dipole polarizability. The atoms also experience …

We identify Ba 4+(Te-like) as a promising candidate for a high-accuracy optical clock. The
lowest-lying electronic states are part of a P 3 J fine structure manifold with anomalous …

Second-stage laser cooling of thulium atoms at the 530.7 nm transition with a natural
linewidth of 350 kHz offers an interesting possibility to study different regimes of a magneto …