Researchers achieve major step towards the quantum chip

Scientists from Austria and Canada are the ultimate goal of quantum optical experiments and functions to be integrated on semiconductor chips, now come a step closer. They have realized for the first time in the lab a viable source of photon pairs in a semiconductor.

Experimental physicists have been using entangled photons years to investigate the properties of the quantum world. For applications of these phenomena in quantum cryptography and quantum computers in everyday use technologies are needed. Physicists hope, therefore, on the availability of quantum-optical chips, in which all the functions required in a small space can be accommodated.

Researchers at the University of Innsbruck and the University of Waterloo have now teamed up with researchers at the University of Toronto was first realized on a semiconductor chip made of gallium arsenide is a source for entangled photon pairs. Gallium arsenide is a common material for the construction of laser diodes. It has an estimate of quantum opticians non-linear characteristics that make a variety of physical phenomena technologically useful.

Thus in the material and photons from a laser split into pairs of photons of lower energy. These generated in a semiconductor photon pairs are entangled, so they have a common quantum state. For the practical use of entanglement for information processing is, however, a problem.

Luxsus phone: White Diamonds 4-iPhone for only € 20 000

The iPhone has caused a revolution in the smartphone market. Now that the iPhone 4 is available, the number of users and fans will probably increase further. But it is so also almost impossible to stand out from the crowd. The only way so far in terms of individuality: the choice between white or black housing. But if you have a few euros on the high edge, which now offer new ways.

The one pack the iPhone 4 in an envelope, which provides true protection from damage, but ausschaut not really good. Others use the other hand, a sock stuck to the sticker on the back or hang the phone, with small figures. Certainly not bad to the other iPhone owners one step ahead and show creativity. However, a jeweler from England now offers the opportunity to make his new iPhone to four totally unique.

Source: gsmarena.com Read the rest of this entry »

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