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 ...

The Aharonov-Bohm effect occupies a pivotal position in modern quantum theory, demonstrating that charged particles are influenced by electromagnetic potentials even in regions where the associated ...

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 previously unexplored energy-level transition in the hydrogen atom, Lothar ...

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 ...

Does quantum physics place limits on the extent to which we have free will? This long-debated question stems from the way different physicists interpret the mathematics of quantum theory, but now ...