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Radio frequency charge sensing in InAs nanowire double quantum dots

Author(s): Jung, M; Schroer, MD; Petersson, KD; Petta, Jason R

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Abstract: We demonstrate charge sensing of an InAs nanowire double quantum dot (DQD) coupled to a radio frequency (rf) circuit. We measure the rf signal reflected by the resonator using homodyne detection. Clear single dot and DQD behavior are observed in the resonator response. rf-reflectometry allows measurements of the DQD charge stability diagram in the few-electron regime even when the dc current through the device is too small to be measured. For a signal-to-noise ratio of one, we estimate a minimum charge detection time of 350 mu s at interdot charge transitions and 9 mu s for charge transitions with the leads. (C) 2012 American Institute of Physics. []
Publication Date: 18-Jun-2012
Electronic Publication Date: 22-Jun-2012
Citation: Jung, M, Schroer, MD, Petersson, KD, Petta, JR. (2012). Radio frequency charge sensing in InAs nanowire double quantum dots. APPLIED PHYSICS LETTERS, 100 (10.1063/1.4729469
DOI: doi:10.1063/1.4729469
ISSN: 0003-6951
Type of Material: Journal Article
Journal/Proceeding Title: APPLIED PHYSICS LETTERS
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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