A hundred years ago, quantum mechanics was a radical theory that baffled even the brightest minds. Today, it's the backbone ...

For the first time, physicists have watched a beam of positronium, a short‑lived atom made of an electron and its antimatter ...

The new research demonstrates for the first time that the wave nature of matter persists even at large scales, using massive ...

Record-breaking experiment shows that a cluster of thousands of atoms can act like a wave as well as a particle.

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still daring to test it. Some theories of quantum gravity suggest light might ...

Can a small lump of metal be in a quantum state that extends over distant locations? A research team at the University of Vienna answers this question with a resounding yes. In the journal Nature, ...

Quantum mechanics, the theory that governs the subatomic world, rests on a persistent paradox. It describes particles that ...

Experiments reveal that metallic nanoparticles thousands of atoms wide can exist in quantum superposition, providing a ...

A study by physicists affiliated with the Foundational Questions Institute (FQxI) found that time ...