Positronium is the simplest bound state, built of an electron and a positron. Studies of
positronium in vacuum and its decays in medium tell us about quantum electrodynamics …

Positronium (Ps) is an exotic hydrogenic atom composed of an electron bound to a positron
via the Coulomb force. Being composed of two low-mass leptons, positronium is, for all …

The field of experimental positronium physics has advanced significantly in the last few
decades, with new areas of research driven by the development of techniques for trapping …

Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the
validity of fundamental physics laws and the design of highly sensitive experiments needs …

Pair production can be triggered by high-intensity lasers via the Breit–Wheeler process.
However, the straightforward laser–laser colliding for copious numbers of pair creation …

We report a new measurement of the positronium (Ps) 2 S 3 1→ 2 P 3 0 interval. Slow Ps
atoms, optically excited to the radiatively metastable 2 S 3 1 level, flew through a microwave …

Within the last decade powerful methods have been developed to study surfaces using
bright low-energy positron beams. These novel analysis tools exploit the unique properties …

Generation of energetic electron-positron pairs using multi-petawatt (PW) lasers has recently
attracted increasing interest. However, some previous laser-driven positron beams have …

Positron binding to molecules is key to extremely enhanced positron annihilation and
positron-based molecular spectroscopy. Although positron binding energies have been …

The recently developed ab initio many-body theory of positron molecule binding [J. Hofierka,
Many-body theory of positron binding to polyatomic molecules, Nature (London) 606, 688 …