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physica status solidi (b)

Spin‐ and charge‐density excitations in quantum dots via Quantum Monte Carlo simulation

Leonardo Colletti, Francesco Pederiva, E. Lipparini, Cyrus J. Umrigar

Published Apr 18, 2007• 1 citation
Publisher

Abstract

Abstract The calculation of the polarizability provides a method of calculating the collective‐modes excitation energies of an electronic system. However, the polarizability is a correlated quantity, thus demanding a major effort when Monte Carlo methods are used for its evaluation. Nevertheless, Quantum Monte Carlo results represent the benchmark in most many‐body physics. We applied a correlated Variational and Diffusion Monte Carlo scheme to a GaAs–AlGaAs quantum dot. Comparison with Raman scattering experiments and previous calculations is considerable. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

DOI
10.1002/pssb.200674605

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