Path to Wigner localization in circular quantum dots
Abstract
Accurate multideterminant ground-state energies of circular quantum dots containing N≤13 electrons as a function of interaction strength have been evaluated by the diffusion quantum Monte Carlo method. Two unique features are found for these confined two-dimensional systems: (1) as the electron density decreases, the quantum dots favor states with zero orbital angular momentum (L=0) ; and (2) for some values of N , the ground state cannot be fully spin-polarized because of a symmetry constraint.
- Publication:
-
Physical Review B
- Pub Date:
- June 2009
- DOI:
- 10.1103/PhysRevB.79.235334
- Bibcode:
- 2009PhRvB..79w5334Z
- Keywords:
-
- 73.21.La;
- 02.70.Ss;
- 73.63.Kv;
- Quantum dots;
- Quantum Monte Carlo methods;
- Quantum dots