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Title

Brueckner-Hartree-Fock study of circular quantum dots

AuthorsEmperador, Agustí; Lipparini, Enrico; Serra, Llorenç
KeywordsHF calculations
Ground states
Quantum dots
Density functional theory
Issue Date22-Jun-2006
PublisherAmerican Physical Society
CitationPhysical Review B 73, 235341 (2006)
AbstractWe calculate ground state energies in the Brueckner-Hartree-Fock theory for $N$ electrons (with $N\le 20$) confined to a circular quantum dot and in presence of a static magnetic field. Comparison with the predictions of Hartree-Fock, local-spin-density and exact configuration-interaction theories is made. We find that the short-range correlations taken into account in Brueckner-Hartree-Fock calculations give an important contribution to the ground state energies, specially in strongly confined dots. In this high-density range, corresponding in practice to self-assembled quantum dots, the results of Brueckner-Hartree-Fock calculations converge to the exact values and are better than those obtained in the local-spin-density approximation.
Description6 pages.-- PACS numbers: 73.21.La, 71.10.-w.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevB.73.235341.
URIhttp://hdl.handle.net/10261/6074
DOI10.1103/PhysRevB.73.235341
ISSN1098-0121
Appears in Collections:(IFISC) Artículos
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