Ordinary silicon chips were found to possess quantum abilities

ScienceMarch 25, 2015

The international group of researchers of Switzerland, Britain and the Netherlands showed the technology developed by them which allows to operate by means of impulses of light a quantum condition of the qubits concluded in a usual silicon substrate and to read out value of this state by means of usual electric measuring methods. Using this technology, scientists created the elementary quantum switch capable to work during one million of one million fraction of a second. This quantum switch, a minimum in one thousand times overtaking other similar silicon switches on work speed, by right it is possible to consider as the fastest man-made quantum device in the world today.

“In the field of quantum calculations is widely used that fact that atoms or other quantum particles can exist at the same time in two states, for example, to be in the low and excited power state. It is known under the name of a condition of quantum superposition which is rather well explained by experiment of Schrödinger in which the cat is at the same time live and dead” – doctor Ellis Bouayer (Dr tells. Ellis Bowyer), the scientist from university of Surrey, – “Superposition of a condition of the orbital moment of atoms is very thin, but we found that the silicon environment creates ideally pure environment for atoms of phosphorus in which quantum information is stored, ensnared a silicon crystal lattice”.

Using supershort, duration some trillionth fractions of a second, impulses of laser light scientists place atom of phosphorus in a condition of quantum superposition which depends on exact time of influence of an impulse. Besides, the condition of superposition remains in inviolability even then when electrons of the electric current flowing via the chip “fly” about atom of phosphorus. “After that we found the strange and improbable fact” – doctor Bouayer tells, – “It appears, the current flowing through structure of quantum bit directly depends on its quantum state”.

Efforts of group of scientists of university of Surrey, University College London, Heriot-Watt’s university in Edinburgh, university of Nijmegen and the Swiss federal institute of technology (Swiss Federal Institute of Technology, ETH) were noticed and estimated by scientific community thanks to what scientists received financing from the British Council of EPSRC (Engineering and Physical Sciences Research Council), necessary for them for continuation of the researches. Further scientists will be engaged in development, creation and testing of quantum elements which will become some kind of standard blocks from which in the future it will be possible to create not only high-speed silicon quantum computers, but also a number of other devices, such as ultraprecise hours and supersensitive biomedical, chemical and other sensors.

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