Factorization of the 𝑁-Electron Wave Function in the Kondo Ground State

Figure 3

This figure shows the coefficients of the state 𝑞^† for three different impurities, F: Friedel, FA: Friedel-Anderson, and K: Kondo. The coefficients are counted from the Fermi level. Most curves are for 𝑁=42, but one curve is for a FA impurity with |𝑉_sd|²=0.05 and 𝑁=22. The curve shown is super-universal because it is independent of the kind of impurity (F, FA, K), independent of 𝑁, and independent of |𝑉_sd|² and other parameters as long as there is a resonance exactly at the Fermi level.