Transient quantum transport in double-dot Aharonov-Bohm interferometers

Matisse Wei Yuan Tu, Wei Min Zhang, Jinshuang Jin, O. Entin-Wohlman, A. Aharony

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Real-time nonequilibrium quantum dynamics of electrons in double-dot Aharonov-Bohm (AB) interferometers is studied using an exact solution of the master equation. The building of the coherence between the two electronic paths shows up via the time-dependent amplitude of the AB oscillations in the transient transport current and can be enhanced by varying the applied bias on the leads, the on-site energy difference between the dots and the asymmetry of the coupling of the dots to the leads. The transient oscillations of the transport current do not obey phase rigidity. The circulating current has an antisymmetric AB oscillation in the flux. The nondegeneracy of the on-site energies and the finite bias cause the occupation in each dot to have an arbitrary flux dependence as the coupling asymmetry is varied.

Original languageEnglish
Article number115453
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number11
DOIs
Publication statusPublished - 2012 Sep 28

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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