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Detection of single spin decoherence in a quantum dot via charge currents

Engel, H. A. and Loss, D.. (2001) Detection of single spin decoherence in a quantum dot via charge currents. Physical review letters, Vol. 86, H. 20. pp. 4648-4651.

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Official URL: http://edoc.unibas.ch/dok/A5254729

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Abstract

We consider a quantum dot attached to leads in the Coulomb blockade regime that has a spin 1/2 ground state. We show that, by applying an ESR field to the dot spin, the stationary current in the sequential tunneling regime exhibits a new resonance peak whose linewidth is determined by the single spin decoherence time T-2. The Rabi oscillations of the dot spin are shown to induce coherent current oscillations from which T-2 can be deduced in the time domain. We describe a spin inverter which can be used to pump current through a double dot via spin hips generated by ESR.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Physical Society
ISSN:0031-9007
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:53

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