Quantum mechanics

Cartoon of the grinning Cheshire cat, perched on a tree limb

Quantum Cheshire cats could have a travelling grin

Researchers postulate that the quantum Cheshire cat effect, in which a property of a quantum object becomes separated from the object itself, can have dynamics of its own

Black-hole laser could have quantum computing applications

Proposed device uses superconducting technology

Conceptual image of waves emerging from a pair of slits in a barrier with wave equations superimposed over it

Wave–particle duality quantified for the first time

Experiment attaches precise numbers to a photon’s wave-like and particle-like character

A personal mission: one scientist’s search for a theory of everything

Sabine Hossenfelder reviews Shell Beach: the Search for the Final Theory by Jesper Grimstrup

An interactive play where quantum physics and psychology collide

Laura Hiscott reviews the play The Mirror Trap and speaks to its writer and star, Simon Watt

Electron’s dual nature appears in a quantum spin liquid

New evidence supports theory that the electron may be composed of two particles

Photo of an atom chip and its electrical connections

Long-awaited magnetic interferometer might probe quantum gravity

Device could interfere much larger molecules than is currently possible

Two researchers in masks stand next to an optical bench containing a laser, mirrors and other equipment.

Chemistry gets put to a quantum test

Researchers use ultracold molecules to explore all possible outcomes of a chemical reaction