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 |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| Note: | Publication type according to Uni Basel Research Database: Journal article |
| Related URLs: | |
| Identification Number: | |
| Last Modified: | 22 Mar 2012 14:26 |
| Deposited On: | 22 Mar 2012 13:53 |
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