Fadel’s group created a state in which the crystal contained a superposition of a single phonon and zero phonons. “In a sense, the crystal is in a state where it is still and vibrating at the same time,” says Fadel. ...

It’s a radical view of quantum behavior that many physicists take seriously. “I consider it completely real,” said Richard MacKenzie, a physicist at the University of Montreal. But how can an infinite number of curving paths add up to a ...