Interaction Effects in the Mesoscopic Regime: A Quantum Monte Carlo Study of Irregular Quantum Dots

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dc.creatorGhosal, Amit
dc.creatorUmrigar, C. J.
dc.creatorJiang, Hong
dc.creatorUllmo, Denis
dc.creatorBaranger, Harold U.
dc.date2004-11-09
dc.date2005-06-02
dc.date.accessioned2026-07-07T06:31:32Z
dc.date.available2026-07-07T06:31:32Z
dc.descriptionWe address the issue of accurately treating interaction effects in the mesoscopic regime by investigating the ground state properties of isolated irregular quantum dots. Quantum Monte Carlo techniques are used to calculate the distributions of ground state spin and addition energy. We find a reduced probability of high spin and a somewhat larger even/odd alternation in the addition energy from quantum Monte Carlo than in local spin density functional theory. In both approaches, the even/odd effect gets smaller with increasing number of electrons, contrary to the theoretical understanding of large dots. We argue that the local spin density approximation over predicts the effects of interactions in quantum dots.
dc.descriptionFinal Version, to appear in PRB as a Rapid Comm
dc.identifierhttps://arxiv.org/abs/cond-mat/0411242
dc.identifierhttp://arxiv.org/abs/cond-mat/0411242
dc.identifierPhys. Rev. B, 241306(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.71.241306
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98636
dc.subjectMesoscale and Nanoscale Physics
dc.titleInteraction Effects in the Mesoscopic Regime: A Quantum Monte Carlo Study of Irregular Quantum Dots
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