In this paper initial experiments towards constructing simple quantum gates in a solid state material are presented. Instead of using specially tailored materials, the aim is to select a subset of randomly distributed ions in the material, which have the interaction necessary to control each other and therefore can be used to do quantum logic operations. The experimental results demonstrate that part of an inhomogeneously broadened absorption line can be selected as a qubit and that a subset of ions in the material can control the resonance frequency of other ions. This opens the way for the construction of quantum gates in rare-earth-ion doped crystals.

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In this paper we will introduce a new method for making optical multi-touch devices. The method is called Planar Scatter Detection and has been prototyped in a 32'' format. The technology is viable for all display sizes ranging from a few inches to over 100''. The advantages with this technology are low cost and good size scalability while maintaining multi-touch performance.

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