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 …

Recent developments in frequency metrology and optical clocks have been based on
electronic transitions in atoms and singly charged ions as references. The control over all …

Quantum electrodynamics (QED) is one of the most fundamental theories of physics and has
been shown to be in excellent agreement with experimental results,,,–. In particular …

Inner-shell electrons naturally sense the electric field close to the nucleus, which can reach
extreme values beyond 1015 V cm− 1 for the innermost electrons. Especially in few-electron …

Precise comparisons of the fundamental properties of matter–antimatter conjugates provide
sensitive tests of charge–parity–time (CPT) invariance, which is an important symmetry that …

We report on the precise measurement of the atomic mass of a single proton with a purpose-
built Penning-trap system. With a precision of 32 parts per trillion our result not only …

Solar-driven CO 2 conversion is an attractive option for producing usable fuels and
chemicals. However, traditionally synthesized TiO 2 materials suffer from the low activity of …

The current status of bound state quantum electrodynamics calculations of transition
energies for few-electron ions is reviewed. Evaluation of one and two body QED correction …

The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7×
10-11 by measuring the cyclotron-frequency ratio R of 208 Pb 41+ to 132 Xe 26+ with the …

Highly charged ions (HCIs) constitute a large class of atomic systems since each element
has as many ionization states as it has protons—in a sense, this extends the periodic table …