Dephasing by electron-phonon interaction in an AB ring with an embedded quantum dot

Akiko Ueda, Mikio Eto

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We study the dephasing effect on the transport properties in an Aharonov-Bohm ring with an embedded quantum dot, due to the electron-phonon interaction. The differential conductance is calculated under finite bias using Keldysh Green function. The electron-phonon interaction is treated (i) by the canonical transformation, or (ii) by the second-order perturbation. By the latter method, we find that the Fano resonance is suppressed by the electron-phonon interaction and that the suppression increases with increasing bias voltage. The calculations by the former method do not yield the bias-voltage dependence of the dephasing effect.

Original languageEnglish
Pages (from-to)1219-1223
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume242
Issue number6
DOIs
Publication statusPublished - 2005 May 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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