Telegraph noise in coupled quantum dot circuits induced by a quantum point contact

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.100.176805
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume100
Issue17
Article number176805
SubjectIntegrated circuits; Measurement theory; Phase transitions; Point contacts; Semiconductor quantum dots; Telegraph; Confined electrons; Electron quantum dot circuits; Quantum information; Telegraph noise; Acoustic noise
AbstractCharge detection utilizing a highly biased quantum point contact has become the most effective probe for studying few electron quantum dot circuits. Measurements on double and triple quantum dot circuits is performed to clarify a back action role of charge sensing on the confined electrons. The quantum point contact triggers inelastic transitions, which occur quite generally. Under specific device and measurement conditions these transitions manifest themselves as bounded regimes of telegraph noise within a stability diagram. A nonequilibrium transition from artificial atomic to molecular behavior is identified. Consequences for quantum information applications are discussed. © 2008 The American Physical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number21274608
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Record identifier00234fc1-325d-4a6f-b53b-cde1edd44be9
Record created2015-03-18
Record modified2016-05-09
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