04 Apr 07 Microchip-falls for Quantum Computer

Ulmer physicist realized the first microchip-falls in Europe, which is used for experiments on the way to the scalable quantum computer.

At Institut for quantum data processing of the University of Ulm Stephan Schulz and Ferdinand Schmidt Kaler realized first microchip-falls in Europe, which is used for experiments on the way to the scalable quantum computer.

The prototype of the three-dimensional linear microchip-falls stores individual Ca+ ions, which are arranged like beads on a chain. Each individual ion represents a quantum bit, similarly to the bits of an everyday computer. The future quantum computer will solve unsolvable problems made of computer science and natural science with unusual arithmetic performances by the use of the quantum bits.

In the new microchip-falls the Ca+ ions are stored by electrical fields. A multiplicity of individual control segments permitted for the first time parallel the allocation of the ion chains into separated single ions, which are shifted controlled by electrical tensions. For the operations of the quantum computer individual ions with laser pulses are manipulated and the result of computation is optically picked out.

Fig.: That microchip has a size of 11×11 mm2 and consists of 64 separately controllable electrodes. It is operated with a frequency by 24 MHz in the ultra high vacuum. (Source: University of Ulm)

 

 

The new microchip-falls is world-wide singular due to the number of their control segments. Thus it orders over a separate memory and processor range around the scaling barness of a quantum computer with individual ions to demonstrate for the first time. A goal is the storage and processing of approximately 100 quantum bits - according to an efficiency, which exceeds each conventional computer far.

This the Universtität Ulm-developed quantum devices are the reference design for the development of scalable ion quantum computers, promoted by the European Union. Similar devices are likewise developed at present in the USA.

Source: University of Ulm

Further information:

* Quantum data processing, University of Ulm: http://www.uni-ulm.de/qiv/

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