Stability diagram and exchange interaction in coupled quantum dots in magnetic fields

L. X. Zhang, D. V. Melnikov, J. P. Leburton

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Properties of the stability diagram and exchange energy of a few-electron laterally coupled quantum dots in magnetic fields are investigated. The calculations are performed by numerically exact diagonalization of the many-body Schrödinger equation. We show variations of the energy separation between the single-particle ground and first excited states, and the exchange energy with biases on the two dots at different magnetic fields. Two-dimensional single-particle wavefunction and electron density profiles show electron localization with magnetic fields. From the extracted double-triple point separation on the stability diagram, we also show that the coupling strength decrease as the magnetic field increases.

Original languageEnglish (US)
Title of host publicationQuantum Information and Computation IV
DOIs
StatePublished - Aug 23 2006
EventQuantum Information and Computation IV - Kissimmee, FL, United States
Duration: Apr 17 2006Apr 19 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6244
ISSN (Print)0277-786X

Other

OtherQuantum Information and Computation IV
CountryUnited States
CityKissimmee, FL
Period4/17/064/19/06

Keywords

  • Coupled quantum dots
  • Exchange interaction
  • Stability diagram

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Zhang, L. X., Melnikov, D. V., & Leburton, J. P. (2006). Stability diagram and exchange interaction in coupled quantum dots in magnetic fields. In Quantum Information and Computation IV [624406] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6244). https://doi.org/10.1117/12.666043