Electrons in quantum dots: One by one | Zendy

Simon Gustavsson | Zendy; Renaud Leturcq | Zendy; Thomas Ihn | Zendy; K. Ensslin | Zendy; A. C. Gossard | Zendy

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Electrons in quantum dots: One by one

Author(s) -

Simon Gustavsson,

Renaud Leturcq,

Thomas Ihn,

K. Ensslin,

A. C. Gossard

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3116227

Subject(s) - quantum point contact , quantum dot , electron , physics , quantum dot laser , charge (physics) , current (fluid) , measure (data warehouse) , noise (video) , condensed matter physics , quantum , quantum well , quantum mechanics , laser , database , artificial intelligence , computer science , image (mathematics) , thermodynamics

A quantum point contact placed close to a quantum dot can be used as a charge detector with time resolution to monitor the charge flow on the level of individual electrons. The current through the quantum point contact may take two possible values corresponding to the situation of an additional electron being on or off the quantum dot. Time traces of such two-level behavior allow to measure the average current, the tunnel rates in and out of the quantum dot, the time-dependent fluctuations of the current (noise), as well as higher-order current correlations. This high-sensitivity method to measure charge flow can also be used to detect time-resolved single-electron interference.

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