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Nuclear spin state narrowing via gate-controlled Rabi oscillations in a double quantum dot

Klauser, D. and Coish, W. A. and Loss, D.. (2006) Nuclear spin state narrowing via gate-controlled Rabi oscillations in a double quantum dot. Physical Review B, Vol. 73, H. 20 , 205302, 12 S..

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Official URL: http://edoc.unibas.ch/dok/A5254638

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Abstract

We study spin dynamics for two electrons confined to a double quantum dot under the influence of an oscillating exchange interaction. This leads to driven Rabi oscillations between the parallel to up arrow down arrow < state and the parallel to down arrow up arrow < state of the two-electron system. The width of the Rabi resonance is proportional to the amplitude of the oscillating exchange. A measurement of the Rabi resonance allows one to narrow the distribution of nuclear spin states and thereby to prolong the spin decoherence time. Further, we study decoherence of the two-electron states due to the hyperfine interaction and give requirements on the parameters of the system in order to initialize in the parallel to up arrow down arrow < state and to perform a root SWAP operation with unit fidelity.
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 Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:48

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