The hydrogen atom continues to be a testbench for a wide variety of fundamental physical
measurements, whose scope has been expanded to the hydrogen-like atoms positronium …

Atoms made of a particle and an antiparticle are unstable, usually surviving less than a
microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it is …

The principle of the equivalence of gravitational and inertial mass is one of the cornerstones
of general relativity. Considerable efforts have been made and are still being made to verify …

One possible route for a precision test of the CPT theorem is to perform spectroscopic
measurements on the antihydrogen atom and compare the results with those from hydrogen …

The positron, the antiparticle of the electron, predicted by Dirac in 1931 and discovered by
Anderson in 1933, plays a key role in many scientific and everyday endeavours. Notably, the …

We report the application of evaporative cooling to clouds of trapped antiprotons, resulting in
plasmas with measured temperature as low as 9 K. We have modeled the evaporation …

We demonstrate controllable excitation of the center-of-mass longitudinal motion of a
thermal antiproton plasma using a swept-frequency autoresonant drive. When the plasma is …

We propose a novel technique which uses laser-cooled negative osmium ions for
sympathetic cooling of antiprotons. Temperatures down to the sub-millikelvin range might be …

Performing measurements of the properties of antihydrogen, the bound state of an
antiproton and a positron, and comparing the results with those for ordinary hydrogen, has …

We have demonstrated storage of plasmas of the charged constituents of the antihydrogen
atom, antiprotons and positrons, in a Penning trap surrounded by a minimum-B magnetic …