We study two-dimensional quantum dots using the variational quantum Monte Carlo technique in the weak-confinement limit where the system approaches the Wigner molecule, i.e., the classical solution of point charges in an external potential. We observe the spin-polarization of electrons followed by a smooth transition to a Wigner-molecule-like state as the confining potential is made weaker.
@article{arxiv.cond-mat/0105452,
title = {Wigner molecules in quantum dots: a quantum Monte Carlo study},
author = {A. Harju and S. Siljamäki and R. M. Nieminen},
journal= {arXiv preprint arXiv:cond-mat/0105452},
year = {2009}
}