Diffusion Monte Carlo study of circular quantum dots

Details Diffusion Monte Carlo study of circular quantum dots Diffusion Monte Carlo study of circular quantum dots

1999-12-09

arxiv.org/abs/cond-mat/9912166v2

Physics

Condensed Matter

7 pages, 4 eps figures. To be published in Phys. Rev. B, September 15th 2000. See erratum cond-mat/0305710

Scientific paper

10.1103/PhysRevB.62.8120

We present ground and excited state energies obtained from Diffusion Monte Carlo (DMC) calculations, using accurate multiconfiguration wave functions, for $N$ electrons ($N\le13$) confined to a circular quantum dot. We analyze the electron-electron pair correlation functions and compare the density and correlation energies to the predictions of local spin density approximation theory (LSDA). The DMC estimated change in electrochemical potential as function of the number of electrons in the dot is compared to that from LSDA and Hartree-Fock (HF) calculations.

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