For the first time, physicists have watched a beam of positronium, a short‑lived atom made of an electron and its antimatter ...
“Positronium is the simplest atom composed of equal-mass constituents, and until it self-annihilates, it behaves as a neutral ...
Experiments reveal that metallic nanoparticles thousands of atoms wide can exist in quantum superposition, providing a ...
First experimental observation of matter-wave diffraction in a short-lived electronpositron atom using a graphene-based ...