Quantum computers hold the promise of solving certain computational tasks much more
efficiently than classical computers. We review recent experimental advances towards a …

Heat engines convert thermal energy into mechanical work and generally involve a large
number of particles. We report the experimental realization of a single-atom heat engine. An …

All-order extensions of relativistic atomic many-body perturbation theory are described and
applied to predict properties of heavy atoms. Limitations of relativistic many-body …

Systematic study of Rb atomic properties is carried out using a high-precision relativistic all-
order method. Excitation energies of the ns, np, nd, and nf (n⩽ 10) states in neutral rubidium …

All evidence so far suggests that the absolute spatial orientation of an experiment never
affects its outcome. This is reflected in the standard model of particle physics by requiring all …

This second volume of the Charged Particle Traps deals with the rapidly expanding body of
research exploiting the electromagnetic confinement of ions, whose principles and …

Extensive calculations of the electric-dipole matrix elements in alkali-metal atoms are
conducted using the relativistic all-order method. This approach is a linearized version of the …

A number of theories aiming at unifying gravity with other fundamental interactions, including
field theory, suggest the violation of Lorentz symmetry,,. Whereas the energy scale of such …

Emission and absorption of single photons by single atoms is a fundamental limit of matter–
light interaction, manifesting its quantum mechanical nature. As a controlled process, it is …

A systematic study of Ca+ atomic properties is carried out using a high-precision relativistic
all-order method where all single, double, and partial triple excitations of the Dirac-Fock …