Enhanced charge detection of spin qubit readout via an intermediate state

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DOIResolve DOI: http://doi.org/10.1063/1.4749281
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TypeArticle
Journal titleApplied Physics Letters
ISSN0003-6951
Volume101
Issue23
Article number233101
AbstractWe employ an intermediate excited charge state of a lateral quantum dot device to increase the charge detection contrast during the qubit state readout procedure, allowing us to increase the visibility of coherent qubit oscillations. This approach amplifies the coherent oscillation magnitude but has no effect on the detector noise resulting in an increase in the signal to noise ratio. In this letter, we apply this scheme to demonstrate a significant enhancement of the fringe contrast of coherent Landau-Zener-Stückelberg oscillations between singlet S and triplet two-spin states.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Security and Disruptive Technologies; Information and Communication Technologies
Peer reviewedYes
NPARC number21269058
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Record identifier128b6697-2061-4b4a-b905-875280a0db1d
Record created2013-12-04
Record modified2016-05-09
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