We study by exact diagonalization, in the lowest Landau level approximation, the Coulomb interaction problem of N = 4 and N = 6 quantum dot in the limit of zero Zeeman coupling. We find that meron excitations constitute the lowest lying states of the quantum dots. This is based on a mapping between the excitations of the dot and states of the Haldane-Shastry spin chain.
Cite
@article{arxiv.cond-mat/0611116,
title = {Fractionalization into merons in quantum dots},
author = {A. Petkovic and M. V. Milovanovic},
journal= {arXiv preprint arXiv:cond-mat/0611116},
year = {2015}
}