Charged-impurity-induced dephasing of a voltage-controlled coded qubit based on electron spin in a triple quantum dot

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.79.205311
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TypeArticle
Journal titlePhysical Review B
Volume79
Issue20
Pages205311-1205311-8
AbstractWe discuss the effect of a charged impurity on the qubit encoded in the two low-energy states of an electrostatically defined triple quantum dot with one-electron spin in each dot. The two qubit levels are identified with the two opposite directions of the motion of a minority spin. The effect of the charged impurity on the coded qubit is mapped onto the problem of an effective spin in a random magnetic field. The effective magnetic field is related to exchange rather than Coulomb interaction which ensures stability of the coded qubit with respect to charge fluctuations.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedYes
NPARC number19371542
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Record identifier5852e15b-36da-4114-bc4e-907e790057db
Record created2012-02-29
Record modified2016-05-09
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