Browse Physics

Researchers propose a new and less challenging way to “squeeze” light, strongly reducing quantum fluctuations to make a beam with unwavering intensity.

Moving at close to the speed of light may create entanglement in particles that seemingly had none while at rest.

A new technique allows sorting of single photons according to their orbital angular momentum–a property that could serve as an alphabet for optical messages.

The Universe may be described as a giant quantum computer, according to a researcher who calculates its total computing power.

Microscopic pinholes may soon allow the one-by-one transfer of photons in a way that mimics the process of Coulomb blockade of electrons.

Portfolio techniques borrowed from the world of finance could aid quantum computing.

A five qubit code might help quantum computers catch mistakes.

A specially prepared Bose-Einstein condensate would produce oppositely directed beams of entangled atoms, which could be used for investigations of entanglement and quantum information theory. In the past only beams of entangled photons have been produced.

Laser photons are great for transmitting quantum information but hard to store. A new theory describes how photon information could be transferred to clouds of atoms in a future quantum computer.

A new scheme allows quantum mechanically entangled pairs of particles to be reused in interactions that would normally destroy their entanglement.

Theorists have shown that a pair of parallel-aligned quantum spins contains less information than a pair of antiparallel spins.