Share Email Print
cover

Proceedings Paper

Stability diagram and exchange interaction in coupled quantum dots in magnetic fields
Author(s): L.-X. Zhang; D. V. Melnikov; J.-P. Leburton
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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 Schroedinger 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.

Paper Details

Date Published: 12 May 2006
PDF: 7 pages
Proc. SPIE 6244, Quantum Information and Computation IV, 624406 (12 May 2006); doi: 10.1117/12.666043
Show Author Affiliations
L.-X. Zhang, Univ. of Illinois at Urbana-Champaign (United States)
D. V. Melnikov, Univ. of Illinois at Urbana-Champaign (United States)
J.-P. Leburton, Univ. of Illinois at Urbana-Champaign (United States)


Published in SPIE Proceedings Vol. 6244:
Quantum Information and Computation IV
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

© SPIE. Terms of Use
Back to Top