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Many things will have to go right for quantum computation to become a realityin the lab. For any of the presently-proposed approaches involving spin statesin solids, an essential requirement is that these spins should be measured atthe single-Bohr-magneton level. Fortunately, quantum computing provides asuggestion for a new approach to this seemingly almost impossible task: convertthe magnetization into a charge, and measure the charge. I show how this mightbe done by exploiting the spin filter effect provided by ferromagnetic tunnelbarriers, used in conjunction with one-electron quantum dots.Comment: 11 pages, LaTeX, 1 figure. To be published in J. Appl. Phys., paper  given at the 43rd Annual MMM Conferenc

Quantum computing and single-qubit measurements using the spin-filter effect (invited)