Quantum dots detect single photons
The quantum dot device consists of a transistor made of different layers of gallium arsenide and aluminium gallium arsenide. One of the layers consists entirely of quantum dots just nanometers across....
Read article: ‘The Quantum Project’ hits the Web
‘The Quantum Project’ hits the Web
The 32-minute film can be downloaded from Sightsound.com. Viewers are charged $3.95 to view it for up to five days, with a higher charge for permanent downloads. The film’s makers, Metafilmics, ...
Quantum heat flow in the lab
Quantized electrical conductance was confirmed in experiments with very narrow conducting wires in the late 1980s. The electrons move through the wire along quantum channels, each of which contributes...
Quantum computers think big
The Innsbruck model relies on ions stored in an array of microtraps. Because the microtraps can be fabricated in a solid state device, thousands of traps can be put into an array. The internal quantum...
Quantum leap for entanglement
Most methods for generating entangled states rely on selecting the entangled pairs, for instance, from a large number of other non-entangled particles. However, last year Klaus Mølmer and Anders ...
Magnetic microchips to process information
The number of transistors on a silicon chip has doubled every 18 months, but many observers believe that semiconductor technology will reach its limit in a decade or so. This has prompted the developm...
Molecules made in a Bose-Einstein Condensate
Molecules are poor candidates for the standard techniques used to create Bose-Einstein condensates because of their complicated internal vibrational and rotational structures. But by creating the mole...
Quantum theory survives three-photon test
The conflict between quantum theory and local realism can be traced back to the work of Schrödinger and Einstein, Podolsky and Rosen in 1935. It remained a philosophical matter until the 1960s wh...
Measuring decoherence in real time
Quantum particles such as electrons can be in a superposition of two or more quantum states. This means that an electron can, for instance, be in two places at the same time. However, classical object...
Solitons formed in Bose–Einstein condensate
Bose–Einstein condensates are trapped atoms that are cooled to low temperatures and occupy the same quantum state. They are ideal for studying and manipulating quantum effects such as solitons a...
