PhysicsWhy John Stewart Bell has been haunting quantum mechanics for decades The “Bell test” was devised in the 1960s to uncover what’s going on in the quantum world, but it continues to be relevant today, says Karmela Padavic-Callaghan Comment
TechnologyUltracold atoms have been 'hyperentangled' for the first time By exerting unprecedented control over extremely cold atoms, researchers have put them in a state with several simultaneously quantum-entangled properties èƵ