40 citations · 148 across the 23 of their papers we have counts for
23 papers
The Range of the Kondo Cloud in Weakly Disordered Hosts
Gerd Bergmann, Richard S. Thompson
The calculation of the Kondo cloud is extended to disordered hosts. For a weakly disordered large three-dimensional host the structure of the ground state is very close to the pure…
The Inner Life of the Kondo Ground State: An Answer to Kenneth Wilson's Question
Gerd Bergmann
The Kondo ground state has been investigated by numerical and exact methods, but the physics behind these results remains veiled. Nobel prize winner Wilson, who engineered the brea…
The Heart of Fidelity
Gerd Bergmann
The multi-electron wave function of an interacting electron system depends on the size of the system, i.e. the number of electrons. Here the question investigated is how the wave f…
A universal definition of the Kondo energy from the orthogonality catastrophe
Gerd Bergmann
The definitions of the Kondo energy in the numerical renormalization group (NRG) and the Friedel artificially inserted resonance (FAIR) theory fail sadly for small samples where th…
Delta-Interference of Two Friedel Resonances
Gerd Bergmann
When a single resonator is coupled to a continuous spectrum one obtains a resonance of finite half-width. Such a resonance is known in many fields of physics. The Friedel resonance…
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…