Loss, D. and Recher, P. and Engel, H. A.. (2001) Electron spins for spintronics and quantum communication in quantum dots and wires. In: Electronic correlations : from meso- to nano-physics : proceedings of the XXXVIth Rencontres de Moriond. Les Ulis, pp. 525-534.
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Official URL: http://edoc.unibas.ch/dok/A5254650
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Abstract
Electron spins in nanostructures such as quantum dots and wires have promising applications for spintronics, quantum computing and quantum communication. We give a brief introduction to the quantum computing proposal using electron spins in quantum dots. A quantum dot in the Coulomb blockade regime, attached to leads and in the presence of a magnetic field is used to study single-spin effects. With an ESR source, the spin can be coherently controlled, leading to Rabi-oscillations of the dot spin. It is shown that the intrinsic single-spin decoherence time T-2 is directly accessible via a stationary charge current through the dot. In addition, we show that the quantum dot acts as an efficient spin filter, single-spin read-out device or as a spin pump. Finally, we consider mobile non-local spin entangled electrons as needed for quantum communication. We propose how to create such EPR pairs by means of Andreev tunneling at a superconductor-normal junction and discuss experimental setups in which spin entanglement and non-locality may be detected via transport measurements.
Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss) |
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UniBasel Contributors: | Loss, Daniel |
Item Type: | Conference or Workshop Item, refereed |
Conference or workshop item Subtype: | Conference Paper |
Publisher: | EDP Sciences |
Note: | Publication type according to Uni Basel Research Database: Conference paper |
Identification Number: |
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Last Modified: | 22 Mar 2012 14:27 |
Deposited On: | 22 Mar 2012 13:56 |
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