Exchange in a silicon-based quantum dot quantum computer architecture

Details Exchange in a silicon-based quantum dot quantum computer architecture Exchange in a silicon-based quantum dot quantum computer architecture

2004-08-25

arxiv.org/abs/cond-mat/0408542v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, submitted to APL

Scientific paper

In bulk silicon, intervalley electronic interference has been shown to lead to strong oscillations in the exchange coupling between impurity electronic wavefunctions, posing a serious manufacturability problem for proposed quantum computers. Here we show that this problem does not arise in proposed architectures using Si/SiGe quantum dots because of the large in-plane strain in Si quantum wells together with the strong confinement potential typical of heterostructures.

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