Ab initio computation of the energies of circular quantum dots

M. Pedersen Lohne, G. Hagen, M. Hjorth-Jensen, S. Kvaal, and F. Pederiva
Phys. Rev. B 84, 115302 – Published 8 September 2011

Abstract

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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  • Received 26 September 2010

DOI:https://doi.org/10.1103/PhysRevB.84.115302

©2011 American Physical Society

Authors & Affiliations

M. Pedersen Lohne1, G. Hagen2,3, M. Hjorth-Jensen4, S. Kvaal5, and F. Pederiva6

  • 1Department of Physics, University of Oslo, N-0316 Oslo, Norway
  • 2Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37831, USA
  • 4Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway
  • 5Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway
  • 6Dipartimento di Fisica,Università di Trento, and I.N.F.N., Gruppo Collegato di Trento, I-38123 Povo, Trento, Italy

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Vol. 84, Iss. 11 — 15 September 2011

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