Spin- and charge-density excitations in quantum dots via Quantum Monte Carlo simulation (Articolo in rivista)

Type
Label
  • Spin- and charge-density excitations in quantum dots via Quantum Monte Carlo simulation (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Colletti, L; Pederiva, F; Lipparini, E; Umrigar, CJ (2007)
    Spin- and charge-density excitations in quantum dots via Quantum Monte Carlo simulation
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Colletti, L; Pederiva, F; Lipparini, E; Umrigar, CJ (literal)
Pagina inizio
  • 2317 (literal)
Pagina fine
  • 2321 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 244 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Ist Nazl Fis Nucl, Grp Coll Trento, I-38050 Trento, Italy; Free Univ Bolzano, Fac Comp Sci, I-39100 Bolzano, Italy; Univ Trent, Dipartimento Fis, I-38050 Trento, Italy; DEMOCRITOS INFM Natl Simulat Ctr, Trieste, Italy; Cornell Univ, Cornell Theory Ctr, Ithaca, NY 14853 USA (literal)
Titolo
  • Spin- and charge-density excitations in quantum dots via Quantum Monte Carlo simulation (literal)
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. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. (literal)
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