Shot noise in electron transport through a double quantum dot: A master equation approach

Shi Hua Ou-Yang, Chi Hang Lam, Jian Qiang You

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

We study shot noise in tunneling current through a double quantum dot connected to two electric leads. We derive two master equations in the occupation-state basis and the eigenstate basis to describe the electron dynamics. The approach based on the occupation-state basis, despite being widely used in many previous studies, is valid only when the interdot coupling strength is much smaller than the energy difference between the two dots. In contrast, the calculations using the eigenstate basis are valid for an arbitrary interdot coupling. Using realistic model parameters, we demonstrate that the predicted currents and shot-noise properties from the two approaches are significantly different when the interdot coupling is not small. Furthermore, properties of the shot noise predicted using the eigenstate basis successfully reproduce qualitative features found in a recent experiment.
Original languageEnglish
Pages (from-to)0505191-05051910
JournalChinese Physics B
Volume19
Issue number5
DOIs
Publication statusPublished - 3 Jun 2010

Keywords

  • Double quantum dot
  • Master equation approach
  • Shot noise in tunneling current

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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