Effects of observation on quantum interference in a laterally coupled double quantum dot using a quantum dot charge sensor

T. Kubo, Y. Tokura, T. Hatano, S. Amaha, S. Teraoka, S. Tarucha

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We theoretically investigated the effects of the observation by a quantum dot charge sensor on an Aharonov-Bohm effect in a laterally coupled double quantum dot using the interpolative 2nd-order perturbation theory. In particular, we introduce the notion of the coherent indirect coupling, which characterizes the strength of the indirect coupling between two quantum dots via the reservoir. As the Coulomb interaction VS for the charge sensing increases, the linear conductance through a double quantum dot decreases because of the many-body correlation effect. The visibility of Aharonov-Bohm oscillation in the linear conductance behaves super-linearly for weak sensing interaction regime and sub-linearly for strong sensing interaction regime.

本文言語English
ページ(範囲)852-855
ページ数4
ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
42
4
DOI
出版ステータスPublished - 2010 2 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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