Many-body perturbation theory calculations on circular quantum dots
2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 76, no 4, 045314- p.Article in journal (Refereed) Published
The possibility to use perturbation theory to systematically improve calculations on circular quantum dots is investigated. A few different starting points, including Hartree-Fock, are tested and the importance of correlation is discussed. Quantum dots with up to 12 electrons are treated and the effects of an external magnetic field are examined. The sums over excited states are carried out with a complete finite radial basis set obtained through the use of B splines. The calculated addition energy spectra are compared with experiments and the implications for the filling sequence of the third shell are discussed in detail.
Place, publisher, year, edition, pages
2007. Vol. 76, no 4, 045314- p.
IdentifiersURN: urn:nbn:se:su:diva-12393DOI: 10.1103/PhysRevB.76.045314ISI: 000248540000067OAI: oai:DiVA.org:su-12393DiVA: diva2:178913