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Published online 14 July 2004 | Nature | doi:10.1038/news040712-11

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Device senses spin of single electron

Tiny magnetic lever could aid quantum computing.

A 12-year research effort has deliveredthe ultimate in sensitivity: an instrument that can feel the force of a singleelectron’s spin.

The device measures the miniscule magnetic force between an electron andthe tip of a tiny cantilever, a lever whose base is anchored to a fixed point.

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