Quantum computing and single-qubit measurements using the spin filter effect
Mesoscale and Nanoscale Physics
2009-10-31 v1 Materials Science
Quantum Physics
Abstract
Many things will have to go right for quantum computation to become a reality in the lab. For any of the presently-proposed approaches involving spin states in solids, an essential requirement is that these spins should be measured at the single-Bohr-magneton level. Fortunately, quantum computing provides a suggestion for a new approach to this seemingly almost impossible task: convert the magnetization into a charge, and measure the charge. I show how this might be done by exploiting the spin filter effect provided by ferromagnetic tunnel barriers, used in conjunction with one-electron quantum dots.
Cite
@article{arxiv.cond-mat/9810295,
title = {Quantum computing and single-qubit measurements using the spin filter effect},
author = {David P. DiVincenzo},
journal= {arXiv preprint arXiv:cond-mat/9810295},
year = {2009}
}
Comments
11 pages, LaTeX, 1 figure. To be published in J. Appl. Phys., paper given at the 43rd Annual MMM Conference