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.
Keywords
Quantum computerQubitPhysicsSpin (aerodynamics)SpinsBohr modelQuantum mechanicsSpin engineeringQuantum technologyBohr magnetonCharge (physics)Spin quantum numberQuantumCondensed matter physicsOpen quantum systemElectronSpin polarization
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Publication Info
- Year
- 1999
- Type
- article
- Volume
- 85
- Issue
- 8
- Pages
- 4785-4787
- Citations
- 76
- Access
- Closed
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Cite This
David P. DiVincenzo
(1999).
Quantum computing and single-qubit measurements using the spin-filter effect (invited).
Journal of Applied Physics
, 85
(8)
, 4785-4787.
https://doi.org/10.1063/1.370481
Identifiers
- DOI
- 10.1063/1.370481
- arXiv
- cond-mat/9810295