Quantum Physics

Gauging whether or not we dwell inside someone else’s computer may come down to advanced AI research—or measurements at the frontiers of cosmology

The Chinese JUNO experiment will aim to answer a mystery about the particles’ mass

A laboratory demonstration of the classic “Wigner’s friend” thought experiment could overturn cherished assumptions about reality

The story of a macroscopic quantum system and a mathematical odyssey

New evidence from neutrinos points to one of several theories about why the cosmos is made of matter and not antimatter

But more data are needed before physicists know for sure

Physicists have found a way the theory might limit the cosmic inflation that is thought to have expanded the early universe

Ultracold atoms can simulate all sorts of quantum behavior

Anomalous motions of stars orbiting our galaxy’s central supermassive black hole might reveal the existence of long-hypothesized tunnels through spacetime

The theory, which emerged in the 1970s as a way to unify the fundamental forces of nature, has profoundly shaped the landscape of particle physics

A proposed experiment to swap fundamental properties between photons carries profound implications for our understanding of reality itself

The intuitive idea that objects influence each other because they are in physical proximity is soon to become another of those beliefs that turn out to be wrong when we look deeper