Quantum dot ground state energies and spin polarizations: soft versus hard chaos
Mesoscale and Nanoscale Physics
2009-11-07 v1 Chaotic Dynamics
Abstract
We consider how the nature of the dynamics affects ground state properties of ballistic quantum dots. We find that ``mesoscopic Stoner fluctuations'', that arise from the residual screened Coulomb interaction, are very sensitive to the degree of chaos. It leads to ground state energies and spin-polarizations whose fluctuations strongly increase as a system becomes less chaotic. The crucial features are illustrated with a model that depends on a parameter that tunes the dynamics from nearly integrable to mostly chaotic.
Cite
@article{arxiv.cond-mat/0211412,
title = {Quantum dot ground state energies and spin polarizations: soft versus hard chaos},
author = {Denis Ullmo and Tatsuro Nagano and Steven Tomsovic},
journal= {arXiv preprint arXiv:cond-mat/0211412},
year = {2009}
}