Publications [#245092] of Harold U. Baranger

Papers Published
  1. Güçlü, AD; Ghosal, A; Umrigar, CJ; Baranger, HU, Interaction-induced strong localization in quantum dots, Physical Review B, vol. 77 no. 4 (2008), pp. 041301(R)(arXiv:0708.1304.) [pdf], [doi] .

    We argue that Coulomb blockade phenomena are a useful probe of the crossover to strong correlation in quantum dots. Through calculations at low density using variational and diffusion quantum Monte Carlo (up to rs ∼55), we find that the addition energy shows a clear progression from features associated with shell structure to those caused by commensurability of a Wigner crystal. This crossover (which occurs near rs ∼20 for spin-polarized electrons) is, then, a signature of interaction-driven localization. As the addition energy is directly measurable in Coulomb blockade conductance experiments, this provides a direct probe of localization in the low density electron gas. © 2008 The American Physical Society.