Crossover from Fermi liquid to Wigner molecule behavior in quantum dots

Details Crossover from Fermi liquid to Wigner molecule behavior in quantum dots Crossover from Fermi liquid to Wigner molecule behavior in quantum dots

1999-03-06

arxiv.org/abs/cond-mat/9903111v2

Phys. Rev. Lett. 82, 3320 (1999); 83, 462(E) (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages RevTeX, 3 figures, corrected Table

Scientific paper

10.1103/PhysRevLett.82.3320

The crossover from weak to strong correlations in parabolic quantum dots at zero magnetic field is studied by numerically exact path-integral Monte Carlo simulations for up to eight electrons. By the use of a multilevel blocking algorithm, the simulations are carried out free of the fermion sign problem. We obtain a universal crossover only governed by the density parameter $r_s$. For $r_s>r_c$, the data are consistent with a Wigner molecule description, while for $r_s

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