Ground-state densities and pair correlation functions in parabolic quantum dots
Abstract
We present an extensive comparative study of ground-state densities and pair distribution functions for electrons confined in two-dimensional parabolic quantum dots over a broad range of coupling strength and electron number. We first use spin-density-functional theory to determine spin densities that are compared with Diffusion Monte Carlo (DMC) data. This accurate knowledge of one-body properties is then used to construct and test a local approximation for the electron-pair correlations. We find very satisfactory agreement between this local scheme and the available DMC data, and provide a detailed picture of two-body correlations in a coupling-strength regime preceding the formation of Wigner-like electron ordering.
Cite
@article{arxiv.cond-mat/0501375,
title = {Ground-state densities and pair correlation functions in parabolic quantum dots},
author = {M. Gattobigio and P. Capuzzi and M. Polini and R. Asgari and M. P. Tosi},
journal= {arXiv preprint arXiv:cond-mat/0501375},
year = {2007}
}
Comments
18 pages, 12 figures, submitted