Many-Body perturbation theory calculations on circular quantum dots

Details Many-Body perturbation theory calculations on circular quantum dots Many-Body perturbation theory calculations on circular quantum dots

2010-04-23

arxiv.org/abs/1004.4107v1

Phys. Rev. B 76, 045314 (2007), http://link.aps.org/doi/10.1103/PhysRevB.76.045314

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 9 figures, 2 tables

Scientific paper

10.1103/PhysRevB.76.045314

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 correla- tion 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.

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