40 citations · 75 across the 9 of their papers we have counts for
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A Compact Treatment of the Friedel-Anderson and the Kondo Impurity Using the FAIR Method
Gerd Bergmann
Although the Kondo effect and the Kondo ground state of a magnetic impurity have been investigated for more than forty years it was until recently difficult if not impossible to ca…
How the Kondo ground state avoids the orthogonality catastrophe
Gerd Bergmann
In the presence of a magnetic impurity the spin-up and down band states are modified differently by the impurity. If the multi-electron scalar product (MESP) between the occupied s…
Quantitative Calculation of the Spatial Extension of the Kondo Cloud
Gerd Bergmann
The internal s-electron polarization in the ground state of a Friedel-Anderson and a Kondo impurity is calculated. The Wilson basis with exponentially fine energies close to the Fe…
The Friedel-Anderson and Kondo Impurity Problem for Arbitrary s-Band Density of States and Exchange Interaction
Gerd Bergmann
In his renormalization paper of the Kondo effect Wilson replaced the full band of s-electrons by a small number of ''Wilson states''. He started from a rather artificial symmetric…