Journal
PHYSICAL REVIEW B
Volume 79, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.235334
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Funding
- U.S. Department of Energy [DE-FG0297ER45632]
- National Science Foundation [DMR-02-05328]
- National Energy Research Scientific Computing Center (NERSC)
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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.
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