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In this talk, I will briefly review the spin-density-functional theory, quantum dot systems and apply the theory to the case of electrons confined in two-dimensional parabolic quantum dots. We first use spin-density-functional theory
to determine spin densities that are compared with Diffusion Monte Carlo (DMC) data
over a broad range of coupling strength and electron number.
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.
This talk is based on our recent paper [M. Gattobigi {\it et al.}, Phys. Rev. B {\bf 72},
045306 (2005)]
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