Quantum physics

Three progressively heavier copies of each type of matter particle exist, and no one knows why. A new paper by Steven Weinberg takes a stab at explaining the pattern.

A proposal for building wormhole-connected black holes offers a way to probe the paradoxes of quantum information.

By considering simple symmetries, physicists working on the “bootstrap” can rediscover the basic form of the known forces that shape the universe.

Readers’ modifications of a bean machine showed how deterministic laws are capable of producing random-seeming behavior.

Playing with a simple bean machine illustrates how deterministic laws can produce probabilistic, random-seeming behavior.

There are many different ways to think about probability. Quantum mechanics embodies them all.

A new look at a ubiquitous phenomenon has uncovered unexpected fractal behavior that could give us clues about the early universe and the arrow of time.

Experimenters in Germany have glimpsed the kind of strange, non-atomic matter thought to fill the cores of merging neutron stars.

Three experiments have vetted quantum Darwinism, a theory that explains how quantum possibilities can give rise to objective, classical reality.