Physicists have finally watched positronium, a short‑lived atom made of an electron and its antimatter twin, behave like a rippling quantum wave instead of a tiny billiard ball. In a set of ...

Physicists have long theorized the existence of a unique state of matter known as a quantum spin liquid. In this state, magnetic particles do not settle into an orderly pattern, even at absolute zero ...

Quantum electrodynamics (QED) provides the fundamental framework for understanding the intricate interactions between light and matter. In the realm of heavy ions—atoms stripped of most of their ...

Physicists in Germany have carried out the most accurate measurement to date of the width of the proton. By examining a ...

Visualisation of the QED interactions in boron-like tin ions. Highly charged heavy ions form a very suitable experimental field for investigating quantum electrodynamics (QED), the best-tested theory ...