Quantum computing

A scanning electron microscope image of the micropillar and a numerical simulation of how the device responds to a laser pulse

Single-photon source is efficient and indistinguishable

New device could find use in "boson-sampling" quantum computers

Photograph of the ion trap used by Dave Wineleand and colleagues at NIST

Physicists take entanglement beyond identical ions

Two independent groups reach a milestone in ion-based quantum computing

Commercial quantum computer works, sort of

D-Wave chip outperforms classical algorithm by a factor of 100 million

Double quantum-teleportation milestone is Physics World 2015 Breakthrough of the Year

Jian-Wei Pan and Chaoyang Lu of the University of Science and Technology of China bag this year's award

A guided tour inside D-Wave’s iconic black box

Quantum-computer maker lifts the lid on its controversial technology

Is D-Wave’s quantum computer actually a quantum computer?

Processor is no better than conventional computer on benchmark test

Spies are keen on quantum computing, claims Washington Post

NSA is funding cryptography-cracking research, says newspaper