Ab initio computation of circular quantum dots

Details Ab initio computation of circular quantum dots Ab initio computation of circular quantum dots

2010-09-24

arxiv.org/abs/1009.4833v1

Phys.Rev.B84:115302,2011

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

17 pages, 4 figures, submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.84.115302

We perform coupled-cluster and diffusion Monte Carlo calculations of the energies of circular quantum dots up to 20 electrons. The coupled-cluster calculations include triples corrections and a renormalized Coulomb interaction defined for a given number of low-lying oscillator shells. Using such a renormalized Coulomb interaction brings the coupled-cluster calculations with triples correlations in excellent agreement with the diffusion Monte Carlo calculations. This opens up perspectives for doing ab initio calculations for much larger systems of electrons.

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