Controlled resonant tunneling in a coupled double-quantum-dot system

Gou Shinkai, Toshiaki Hayashi, Yoshiro Hirayama, Toshimasa Fujisawa

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The authors investigate electrostatic coupling between two double quantum dots (DQDs) defined in an AlGaAsGaAs heterostructure by measuring the correlation between resonant tunneling currents through the DQDs. Resonant tunneling in one DQD can be controlled by the charge state of the other DQD. This controlled resonant tunneling is consistent with the capacitance model for the geometry and can be used to investigate the statistics of single-electron charge states in the DQD. The observed electrostatic coupling is strong enough to perform two-qubit quantum gates both for charge- and electron-spin-based qubit schemes.

Original languageEnglish
Article number103116
JournalApplied Physics Letters
Volume90
Issue number10
DOIs
Publication statusPublished - 2007 Mar 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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