Browse Physics

Transitions in an atom can allow nondestructive measurement of the quantum vacuum state.

Optical experiments let researchers fully characterize the quantum transformations corresponding to photon creation and annihilation operators.

Laser light scattered from a single atom undergoes large optical phase shifts that may be useful in imaging and quantum information transmission.

Contact with the environment usually destroys the delicate operations of a quantum computer, but engineered dissipative processes may allow for a more robust preparation and processing of quantum states.

Two separate groups demonstrate the temporary storage and subsequent release of photons using very different quantum devices.

Quantum information lost after a measurement can be recovered using quantum error correction methods.

Theoretical calculations describe the behavior of a large quantum circuit by taking advantage of certain symmetrical relationships between superconducting elements.

Adding impurities to a topological superfluid—a predicted state of matter believed to host Majorana particles—may be the best way to prove it exists.

Manganese defects in zinc oxide have been identified as a class of electrically controllable qubits.

Light stored in a Bose-Einstein condensate can be manipulated with light to create an optical AND gate.

Individual neutral atoms trapped in optical tweezers have been cooled to their quantum ground state, raising hopes that they can be used to process quantum information.

“Quantum keys” can be sent long distances on high-traffic optical fibers.

The combination of several quantum states that are local can yield a nonlocal state.

A quantum twist on digital holography offers improved imaging and the chance to reach new and difficult wavelength regions.

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

The quantum states of light emitted by quantum dots stand up to the rigors of frequency conversion.

Researchers have applied a combination of an electric field and mechanical strain to a system of quantum dots in order to correct for asymmetries that usually prevent these semiconductor nanostructures from emitting entangled photons.

State of the art quantum measurements show that the original formulation of Heisenberg’s uncertainty principle can be violated.

Two separate experiments have demonstrated the fast transport of trapped ions using trapping potentials that trace out the path for the ions to follow.

Quantum repeaters, devices that have been proposed for transporting encrypted information, could help collect light from distant telescopes in large area arrays.