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Measurement efficiency and n-shot readout of spin qubits

Engel, H. A. and Golovach, V. N. and Loss, D. and Vandersypen, L. M. K. and Elzerman, J. M. and Hanson, R. and Kouwenhoven, L. P.. (2004) Measurement efficiency and n-shot readout of spin qubits. Physical review letters, Vol. 93, H. 10 , 106804, 4 S..

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Official URL: http://edoc.unibas.ch/dok/A5254676

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Abstract

We consider electron spin qubits in quantum dots and define a measurement efficiency e to characterize reliable measurements via n-shot readouts. We propose various implementations based on a double dot and a quantum point contact (QPC) and show that the associated efficiencies e vary between 50 readout in the latter case. We model the readout microscopically and derive its time dynamics in terms of a generalized master equation, calculate the QPC current, and show that it allows spin readout under realistic conditions.
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
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:53

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