Globally controlled artificial semiconducting molecules as quantum computers

Details Globally controlled artificial semiconducting molecules as quantum computers Globally controlled artificial semiconducting molecules as quantum computers

2005-03-17

arxiv.org/abs/quant-ph/0503161v1

Physics

Quantum Physics

Scientific paper

Quantum computers are expected to be considerably more efficient than classical computers for the execution of some specific tasks. The difficulty in the practical implementation of thoose computers is to build a microscopic quantum system that can be controlled at a larger mesoscopic scale. Here I show that vertical lines of donor atoms embedded in an appropriate Zinc Oxide semiconductor structure can constitute artificial molecules that are as many copy of the same quantum computer. In this scalable architecture, each unit of information is encoded onto the electronic spin of a donor. Contrary to most existing practical proposals, here the logical operations only require a global control of the spins by electromagnetic pulses. Ensemble measurements simplify the readout. With appropriate improvement of its growth and doping methods, Zinc Oxide could be a good semiconductor for the next generation of computers.

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