Effective Hamiltonian for two-electron Quantum Dots from weak to strong parabolic confinement
Mesoscale and Nanoscale Physics
2017-04-27 v1 Quantum Physics
Abstract
We model quasi-two-dimensional two-electron Quantum Dots in a parabolic confinement potential with rovibrational and purely vibrational effective Hamiltonian operators. These are optimized by non-linear least-square fits to the exact energy levels. We find, that the vibrational Hamiltonian describes the energy levels well and reveals how relative contributions change on varying the confinement strength. The rovibrational model suggests the formation of a rigid two-electron molecule in weak confinement and we further present a modified model, that allows a very accurate transition from weak to strong confinement regimes.
Keywords
Cite
@article{arxiv.1704.08114,
title = {Effective Hamiltonian for two-electron Quantum Dots from weak to strong parabolic confinement},
author = {Torsten Victor Zache and Aniruddha Chakraborty},
journal= {arXiv preprint arXiv:1704.08114},
year = {2017}
}