Brueckner-Hartree-Fock study of circular quantum dots

Abstract

We calculate ground state energies in the Brueckner-Hartree-Fock theory for $N$ electrons (with $N\le 20$) confined to a circular quantum dot and in presence of a static magnetic field. Comparison with the predictions of Hartree-Fock, local-spin-density and exact configuration-interaction theories is made. We find that the correlations taken into account in Brueckner-Hartree-Fock calculations give an important contribution to the ground state energies, specially in strongly confined dots. In this high-density range, corresponding in practice to self-assembled quantum dots, the results of Brueckner-Hartree-Fock calculations are close to the exact values and better than those obtained in the local-spin-density approximation.

Regular article

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Cited by in corpus (4)

• Symmetry breaking and quantum correlations in finite systems: Studies of quantum dots and ultracold Bose gases and related nuclear and chemical methods
• Spin projected unrestricted Hartree-Fock ground states for harmonic quantum dots
• Spin and rotational symmetries in unrestricted Hartree Fock states of quantum dots
• Coupled cluster theory for the ground and excited states of two dimensional quantum dots