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

L.-X. Zhang; D. V. Melnikov; J.-P. Leburton

doi:10.1117/12.666043

12 May 2006 Stability diagram and exchange interaction in coupled quantum dots in magnetic fields

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

Proceedings Volume 6244, Quantum Information and Computation IV; 624406 (2006) https://doi.org/10.1117/12.666043
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

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.

Citation Download Citation

L.-X. Zhang, D. V. Melnikov, and J.-P. Leburton "Stability diagram and exchange interaction in coupled quantum dots in magnetic fields", Proc. SPIE 6244, Quantum Information and Computation IV, 624406 (12 May 2006); https://doi.org/10.1117/12.666043

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