Quantum Physics

Initial data from the Muon g-2 experiment have excited particle physicists searching for undiscovered subatomic particles and forces

Muons and electrons might not experience the same fundamental interactions, contrary to Standard Model predictions

Physicists have new ideas about why the energy of empty space is so much weaker than it is predicted to be

Just because a mathematical formula works does not mean it reflects reality

One of the most basic processes in all of nature—a subatomic particle’s transition between discrete energy states—is surprisingly complex and sometimes predictable, recent work shows

Physicists describe a way to merge quantum theory with Einstein’s special theory of relativity—and even a method to test it experimentally

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