The numerical results demonstrate that the Coulomb repulsion between the localized electrons does cause a universal gap in the single-electron density of states near the Fermi energy whose form is in reasonable agreement with our scaling predictions.

• 数值结果表明：库仑排斥确实导致了库仑能隙的普遍存在，单电子态密度在费米能级附近的渐近行为很好地符合我们的分析预测。