Browse Physics

A newly-developed “quantum microscope” uses photoionization and an electrostatic magnifying lens to directly observe the electron orbitals of an excited hydrogen atom.

The demonstration of a single-particle interferometer opens the door to a number of applications, from investigations of gravity to surface impact physics.

Researchers propose how to realize time crystals, structures whose lowest-energy states are periodic both in time and space.

David Wineland and Serge Haroche, who studied photons and atoms in new ways, have won the 2012 Nobel Prize in Physics.

Researchers demonstrate a scheme that allows counting up to 100 atoms in a given quantum state, which may enable high precision measurements with entangled states.

Two proposed experiments may allow measurement of how much entanglement is present in a many-body quantum system.

An optomechanical system in which light and matter exchange roles promises new kinds of quantum states.

Variations in density in an ultracold gas reveal sound waves of quantum origin.

Shifts in atomic energy levels caused by electron interaction with virtual photons can also occur in an ensemble of atoms acting cooperatively.

Interacting atoms mimic the behavior of identical fermions.

A technique from ion spectroscopy reveals the quantum nature of a mechanical system at low temperature.

The quantum state of atoms known as a Bose-Einstein condensate can be a tool for probing quantum effects in empty space.

Researchers coaxed an electron to orbit an atomic nucleus like a tiny planet.

Niels Bohr’s famous correspondence principle–that classical and quantum physics must agree under certain conditions–is not correct the way he and many modern textbooks have stated it.